Recognised as Decimal number
1.68 × 10^20
- Positive
- Decimal
- 0 d.p.
- Exact fraction
- 3 s.f.
1.68 × 10^20 is a decimal number equal to 168,000,000,000,000,000,000⁄1. It lies between 168,000,000,000,000,000,000 and 168,000,000,000,000,000,000, and as a percentage it is 1.68 × 10^22%.
Number properties
Absolute value1.68 × 10^20
SignPositive
Integer part168,000,000,000,000,000,000
Fractional part0
Decimal places0
Ceiling168,000,000,000,000,000,000
Rounded to nearest168,000,000,000,000,000,000
Truncated168,000,000,000,000,000,000
Fractions & ratios
Ratio168,000,000,000,000,000,000 : 1
As a percentage1.68 × 10^22%
Reciprocal5.95238095 × 10^-21≈
Arithmetic
Double3.36 × 10^20
Half8.4 × 10^19
Square2.8224 × 10^40
Cube4.741632 × 10^60
Square root12,961,481,396.8157≈
Cube root5,517,848.35276224≈
Negation-1.68 × 10^20
Natural logarithm46.5704956533≈
Logarithm base 1020.2253092817≈
Representations
Decimal1.68 × 10^20
Scientific notation1.68 × 10^20
Exponential1.68e+20
IEEE 754 binary64 (hex)0x442236EFCBCBB340the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x6111B77E32-bit single precision, may lose accuracy
Rounding & precision
Significant figures as written3counted from the digits as typed, not from the value
To 0 decimal places168000000000000000000
To 1 decimal place168000000000000000000.0
To 2 decimal places168000000000000000000.00
To 3 decimal places168000000000000000000.000
To 4 decimal places168000000000000000000.0000
To 1 significant figure2e+20
To 2 significant figures1.7e+20
To 3 significant figures1.68e+20
To 4 significant figures1.68e+20
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As a fraction
Also reads as
#168E18 (colour)
- #168E18
- Green
- Dark
- Nearest: Forest green
#168E18 is a green with RGB values 22, 142, 24 and HSL 121°, 73%, 32%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Forest green.
Colour values
#168E18#168E18
HEX#168E18
RGBrgb(22, 142, 24)
RGB (0–1)0.0863, 0.5569, 0.0941
RGB percentages8.6%, 55.7%, 9.4%
HSLhsl(121, 73.2%, 32.2%)
HSV / HSBhsv(121, 84.5%, 55.7%)
CMYK84.5%, 0%, 83.1%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,478,168
CSS custom property--colour: #168E18;
Brightness & contrast
Relative luminance0.19583WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.92:1
Contrast with white4.27:1WCAG normal text: Fail
Contrast with black4.92:1WCAG normal text: AA
Greyscale equivalent#6C6C6C
Inverted#E971E7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.27:1WCAG large text: AA
Contrast with black, large text4.92:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#8E168C
Analogous#508E16, #168E54
Triadic#18168E, #8E1816
Split complementary#54168E, #8E1650
Tetradic#16508E, #8E168C, #8E5416
Tints, shades & saturation
Channel breakdown
R22
G142
B24
Red22 (8.6%)
Green142 (55.7%)
Blue24 (9.4%)
Hue121°
Saturation (HSL)73.17%
Lightness32.16%
Dominant channelGreen
Hex per channelR 16 · G 8E · B 18
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Harmonies
Similar named colours
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