Number
24
- Positive
- Even
- Composite
- 2 digits
24 is an even 2-digit integer and a composite number. It has 8 divisors and a digital root of 6.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value24
Digit count2
Digit sum6
Digital root6repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^3 × 3
Distinct prime factors22, 3
Number of divisors8
Sum of divisors σ(n)60
Aliquot sum36sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)8integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 6, 8, 12, 248 in total
Arithmetic
Representations
Decimal24
Binary110005 bits
Octal30
Hexadecimal18
Base 36O
Roman numeralXXIV
In wordstwenty-four
Ordinaltwenty-fourth
Scientific notation2.4 × 10^1
Engineering notation24
Nearest landmarks
Powers & multiples
24 to the power 2576
24 to the power 313,824
24 to the power 4331,776
24 to the power 57,962,624
First ten multiples24, 48, 72, 96, 120, 144, 168, 192, 216, 240
Powers of twoBetween 2^4 (16) and 2^5 (32)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5No, remainder 4
Divisible by 6Yes
Divisible by 7No, remainder 3
Divisible by 8Yes
Divisible by 9No, remainder 6
Divisible by 10No, remainder 4
Divisible by 11No, remainder 2
Divisible by 12Yes
Divisible by 100No, remainder 24
Collatz (3n + 1) trajectory
Steps to reach 110the total stopping time
Highest value reached24
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps24 → 12 → 6 → 3 → 10 → 5 → 16 → 8 → 4 → 2 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage2,400%
24% as a decimal0.24
24% of 10024
24% of 1,000240
As a fraction of 10024/100
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