Recognised as Number
7,018
- Positive
- Even
- Composite
- 4 digits
7,018 is an even 4-digit integer and a composite number. It has 12 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value7,018
Digit count4
Digit sum16
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 11^2 × 29
Distinct prime factors32, 11, 29
Number of divisors12
Sum of divisors σ(n)11,970
Aliquot sum4,952sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)3,080integers below n that share no factor with it
Carmichael function λ(n)1,540the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 3,080
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 11, 22, 29, 58, 121, 242, 319, 638, 3,509, 7,01812 in total
Arithmetic
Previous number7,017
Next number7,019
Double14,036
Half3,509
Square49,252,324
Cube345,652,809,832
Square root83.773504165≈irrational, shown to 9 decimal places
Cube root19.145694347≈
Negation-7,018
Reciprocal0.0001424907≈
Representations
Decimal7,018
Binary110110110101013 bits
Octal15552
Hexadecimal1B6A
Base 365EY
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsseven thousand and eighteen
Ordinalseven thousand and eighteenth
Scientific notation7.018 × 10^3
Engineering notation7.018 × 10^3
In other bases
Ternary100121221base 3; the most digit-efficient integer base after e: 9 digits
Quinary211033base 5; one hand: 6 digits
Septenary26314base 7: 5 digits
Nonary10557base 9; each digit is two ternary digits: 5 digits
Duodecimal408abase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 4 digits
Vigesimalhaibase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal1:56:58base 60; Babylonian, and still how an hour and a circle are divided: 3 digits
Balanced ternary101T0T0T1digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary110110010111110base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0001101101101010
Bit length13 bitsto write the magnitude
Set bits8the population count, or Hamming weight
Zero bits5within that length
Bit parityeven8 set bits, so even; not the same as the number itself being even
Highest set bitbit 12worth 4,096
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes21b 6a
Gray code1011011011111n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0001101101101010
32-bit00000000000000000001101101101010
64-bit0000000000000000000000000000000000000000000000000001101101101010
One's complement1110010010010101at 16 bits, every bit flipped
Bits reversed0101011011011000at 16 bits
Rotated left by 10011011011010100at 16 bits, wrapping
Shifted left by 111011011010100= 14,036, no wrap
Shifted right by 1110110110101= 3,509, discarding the low bit
These bits as a double3.4673527 × 10^-320≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
7,018 to the power 249,252,324
7,018 to the power 3345,652,809,832
7,018 to the power 42,425,791,419,400,976
7,018 to the power 517,024,204,181,356,049,568
First ten multiples7,018, 14,036, 21,054, 28,072, 35,090, 42,108, 49,126, 56,144, 63,162, 70,180
Powers of twoBetween 2^12 (4,096) and 2^13 (8,192)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5No, remainder 3
Divisible by 6No, remainder 4
Divisible by 7No, remainder 4
Divisible by 8No, remainder 2
Divisible by 9No, remainder 7
Divisible by 10No, remainder 8
Divisible by 11Yes
Divisible by 12No, remainder 10
Divisible by 100No, remainder 18
Collatz (3n + 1) trajectory
Steps to reach 157the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps7,018 → 3,509 → 10,528 → 5,264 → 2,632 → 1,316 → 658 → 329 → 988 → 494 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage701,800%
7,018% as a decimal70.18
7,018% of 1007,018
7,018% of 1,00070,180
As a fraction of 1007,018/100
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Derived from 7,018
Also reads as
7018 (year)
- Common year
- 365 days
- 71st century
- Horse
- 53 ISO weeks
7018 will be a common year of 365 days. It begins on a Thursday and ends on a Thursday. Easter Sunday falls on 19 April.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Thursday365 days is 52 weeks and 1 day, and the remainder starts on the weekday 1 January falls on
Sundays52
Mondays52
Tuesdays52
Wednesdays52
Thursdays53one of the extras
Fridays52
Saturdays52
Friday the 13th3 of them13 February, 13 March, 13 November
ISO weeks53a long year: 1 January is a Thursday, or a Wednesday in a leap year, so a week 53 exists
Same calendar as7007the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in7029, 7035, 704611 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 7018
January31 days, starts Thursday
February28 days, starts Sunday
August31 days, starts Saturday
September30 days, starts Tuesday
October31 days, starts Thursday
November30 days, starts Sunday
December31 days, starts Tuesday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start159,299,481,600
Unix timestamp at the end159,331,017,599
Years from now4,992 years from now
Days from today1,823,028 days to 1 January
The number 7018
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Also reads as
#770011 (colour)
- #770011
- Red
- Dark
- Nearest: Maroon
#770011 is a red with RGB values 119, 0, 17 and HSL 351°, 100%, 23%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Maroon.
Colour values
#770011#770011
HEX#770011
HEX (short)#701
RGBrgb(119, 0, 17)
RGB (0–1)0.4667, 0, 0.0667
RGB percentages46.7%, 0%, 6.7%
HSLhsl(351.4, 100%, 23.3%)
HSV / HSBhsv(351.4, 100%, 46.7%)
CMYK0%, 100%, 85.7%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,798,801
CSS custom property--colour: #770011;
Brightness & contrast
Relative luminance0.03962WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.72:1
Contrast with white11.72:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#1B1B1B
Inverted#88FFEE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.72:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#007766
Analogous#77004C, #772B00
Triadic#117700, #001177
Split complementary#00772B, #004C77
Tetradic#4C7700, #007766, #2B0077
Tints, shades & saturation
Channel breakdown
R119
G0
B17
Red119 (46.7%)
Green0 (0%)
Blue17 (6.7%)
Hue351.43°
Saturation (HSL)100%
Lightness23.33%
Dominant channelRed
Hex per channelR 77 · G 00 · B 11
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