Universal constants and number names
Created | Updated Apr 10, 2006
Universal constants
| Constant name | magnitude | defined as | value | units | units name(s) |
| nothing | ø | void | |||
| Planck | h | 6.62606876(52)E-15 | Js | Joule second | |
| or | 4.13566727(16) E-15 | eVs | electron Volt second | ||
| Dirac | h | = h/2π | 1.054571596(82)E-34 | Js | Joule seconde |
| or | 6.58211889(26)E-16 | eVs | electron Volt seconde | ||
| Planck Length | lP | 1.6160(12)E-35 | m | meter | |
| Planck mass | mP | 2.1767(16)E-8 | kg | kilogram | |
| Permittivity of nothing | ε0 | = 1/µ0*c^2 | 8.854187817E-12 | F/m | force per meter |
| Impedance of nothing | Z0 | = µ0c | 376.730313461 | ω | Ohm |
| Fermi | 1.4E-50 | J/m^3 | Joule per kubic meter | ||
| Magnetic | µ0 | 4πE-7 | NA^-2 | Newton per Ampere squared | |
| or | 12.566370614E-7 | NA^-2 | |||
| infinity | ∞ | ℵ | all |
used scientific notation where E stands for "10^"
Human names of special numbers
| American name | British name | prefix name | prefix | power of 10 |
| yocto | y | 10-24 | ||
| zepto | z | 10-21 | ||
| atto | a | 10-18 | ||
| femto | f | 10-15 | ||
| pico | p | 10-12 | ||
| nano | n | 10-9 | ||
| micro | µ | 10-6 | ||
| milli | m | 10-3 | ||
| centi | c | 10-2 | ||
| deci | d | 10-1 | ||
| one | one | single | 100 | |
| two | two | double | 2 | |
| three | three | triple | 3 | |
| four | four | quad | 4 | |
| five | five | 5 | ||
| six | six | 6 | ||
| seven | seven | 7 | ||
| eight | eight | octo | 8 | |
| nine | nine | 9 | ||
| ten | ten | deca | da | 101 |
| eleven | eleven | 11 | ||
| twelve | twelve | 12 | ||
| thirteen | thirteen | 13 | ||
| twenty | twenty | 20 | ||
| thirty | thirty | 30 | ||
| forty | forty | 40 | ||
| fifty | fifty | 50 | ||
| sixty | sixty | 60 | ||
| seventy | seventy | 70 | ||
| eighty | eighty | 80 | ||
| ninety | ninety | 90 | ||
| hundred | hundred | hecto | h | 102 |
| thousand | thousand | kilo | k | 103 |
| million | million | mega | M | 106 |
| billion | milliard | giga | G | 109 |
| trillion | billion | tera | T | 1012 |
| quadrillion | peta | P | 1015 | |
| quintillion | trillion | exa | E | 1018 |
| sextillion | zeta | Z | 1021 | |
| septillion | quadrillion | yotta | Y | 1024 |
| octillion | 1027 | |||
| nonillion | quintillion | 1030 | ||
| decillion | 1033 | |||
| undecillion | sexillion | 1036 | ||
| duodecillion | 1039 | |||
| tredecillion | septillion | 1042 | ||
| quattuordecillion> | 1045 | |||
| quindecillion | octillion | 1048 | ||
| sexdecillion | 1051 | |||
| septendecillion | nonillion | 1054 | ||
| octodecillion | 1057 | |||
| novemdecillion | decillion | 1060 | ||
| vigintillion | 1063 | |||
| undecillion | 1066 | |||
| Dutchillion? | Dutchillion? | 1069 | ||
| duodecillion | 1072 | |||
| 1075 | ||||
| tredecillion | 1078 | |||
| 1081 | ||||
| quattuordecillion | 1084 | |||
| 1087 | ||||
| quindecillion | 1090 | |||
| 1093 | ||||
| sexdecillion | 1096 | |||
| Whoillion | Whoillion | 1099 | ||
| googol | googol | 10100 | ||
| septendecillion | 10102 | |||
| octodecillion | 10108 | |||
| novemdecillion1 | 10114 | |||
| vigintillion | 10120 | |||
| Douglillion | Douglillion | 10126 | ||
| centillion | 10303 | |||
| centillion | 10600 | |||
| DNAillion | DNAillion | 101764 = 10 (42^2) | ||
| Skewes | Skewes | e^ee79 | ||
| googolplex | googolplex | 10googol | ||
| Graham | Graham | 3^..(63!times^)..^3 | ||
| Moser | Moser | '2 in a Megagon' = 2[2[5]] = 2[256[3]256] |
1Perhaps novemdecillion is also 10109
