Decimal number
4 × 10^18
- Positive
- Decimal
- 0 d.p.
- Exact fraction
4 × 10^18 is a decimal number equal to 4,000,000,000,000,000,000⁄1. It lies between 4,000,000,000,000,000,000 and 4,000,000,000,000,000,000, and as a percentage it is 4 × 10^20%.
Number properties
Absolute value4 × 10^18
SignPositive
Integer part4,000,000,000,000,000,000
Fractional part0
Decimal places0
Ceiling4,000,000,000,000,000,000
Rounded to nearest4,000,000,000,000,000,000
Truncated4,000,000,000,000,000,000
Fractions & ratios
Ratio4,000,000,000,000,000,000 : 1
As a percentage4 × 10^20%
Reciprocal2.5 × 10^-19≈
Arithmetic
Double8 × 10^18
Half2 × 10^18
Square1.6 × 10^37
Cube6.4 × 10^55
Square root2,000,000,000≈
Cube root1,587,401.0519682≈
Negation-4 × 10^18
Natural logarithm42.832826035≈
Logarithm base 1018.6020599913≈
Representations
Decimal4 × 10^18
Scientific notation4 × 10^18
Exponential4e+18
IEEE 754 binary64 (hex)0x43CBC16D674EC800the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x5E5E0B6B32-bit single precision, may lose accuracy
Rounding
To 0 decimal places4000000000000000000
To 1 decimal place4000000000000000000.0
To 2 decimal places4000000000000000000.00
To 3 decimal places4000000000000000000.000
To 4 decimal places4000000000000000000.0000
To 1 significant figure4000000000000000000
To 2 significant figures4000000000000000000
To 3 significant figures4000000000000000000
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Neighbouring values
As a fraction
Also reads as
#040E17 (colour)
- #040E17
- Blue
- Dark
- Nearest: Black
#040E17 is a blue with RGB values 4, 14, 23 and HSL 208°, 70%, 5%. It is a dark colour, so white text on it reaches 19.4:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#040E17#040E17
HEX#040E17
RGBrgb(4, 14, 23)
RGB (0–1)0.0157, 0.0549, 0.0902
RGB percentages1.6%, 5.5%, 9%
HSLhsl(208.4, 70.4%, 5.3%)
HSV / HSBhsv(208.4, 82.6%, 9%)
CMYK82.6%, 39.1%, 0%, 91%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer265,751
CSS custom property--colour: #040E17;
Brightness & contrast
Relative luminance0.00402WCAG 2.x, 0 is black and 1 is white
Perceived brightness13.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.44:1
Contrast with white19.44:1WCAG normal text: AAA
Contrast with black1.08:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#FBF1E8
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.44:1WCAG large text: AAA
Contrast with black, large text1.08:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#170D04
Analogous#041717, #040417
Triadic#17040E, #0E1704
Split complementary#170404, #171704
Tetradic#170417, #170D04, #041704
Tints, shades & saturation
Channel breakdown
R4
G14
B23
Red4 (1.6%)
Green14 (5.5%)
Blue23 (9%)
Hue208.42°
Saturation (HSL)70.37%
Lightness5.29%
Dominant channelBlue
Hex per channelR 04 · G 0E · B 17
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