# Math2.org Math Tables: Number Notation

(Math)

### Hierarchy of Numbers

0 (zero) 1 (one) 2 (two) 3 (three) 4 (four) 5 (five) 6 (six) 7 (seven) 8 (eight) 9 (nine) 10 (ten) 10^2 (hundred) 10^3 (thousand)

name American-French English-German
million 10^6 10^6
billion 10^9 10^12
trillion 10^12 10^18
quintillion 10^18 10^30
sextillion 10^21 10^36
septillion 10^24 10^42
octillion 10^27 10^48
nonillion 10^30 10^54
decillion 10^33 10^60
undecillion 10^36 10^66
duodecillion 10^39 10^72
tredecillion 10^42 10^78
quatuordecillion 10^45 10^84
quindecillion 10^48 10^90
sexdecillion 10^51 10^96
septendecillion 10^54 10^102
octodecillion 10^57 10^108
novemdecillion 10^60 10^114
vigintillion 10^63 10^120
 googol 10^100 googolplex 10^googol = 10^(10^100)

### SI Prefixes

 Number Prefix Symbol 10 1 deka- da 10 2 hecto- h 10 3 kilo- k 10 6 mega- M 10 9 giga- G 10 12 tera- T 10 15 peta- P 10 18 exa- E 10 21 zeta- Z 10 24 yotta- Y
 Number Prefix Symbol 10 -1 deci- d 10 -2 centi- c 10 -3 milli- m 10 -6 micro- u (greek mu) 10 -9 nano- n 10 -12 pico- p 10 -15 femto- f 10 -18 atto- a 10 -21 zepto- z 10 -24 yocto- y

### Roman Numerals

 I=1 V=5 X=10 L=50 C=100 D=500 M=1 000 _V=5 000 _X=10 000 _L=50 000 _C = 100 000 _D=500 000 _M=1 000 000
Examples:
 ```1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X``` ```11 = XI 12 = XII 13 = XIII 14 = XIV 15 = XV 16 = XVI 17 = XVII 18 = XVIII 19 = XIX 20 = XX 21 = XXI``` ```25 = XXV 30 = XXX 40 = XL 49 = XLIX 50 = L 51 = LI 60 = LX 70 = LXX 80 = LXXX 90 = XC 99 = XCIX ```

### Number Base Systems

decimal binary ternary oct hex
0 0 0 0 0
1 1 1 1 1
2 10 2 2 2
3 11 10 3 3
4 100 11 4 4
5 101 12 5 5
6 110 20 6 6
7 111 21 7 7
8 1000 22 10 8
9 1001 100 11 9
10 1010 101 12 A
11 1011 102 13 B
12 1100 110 14 C
13 1101 111 15 D
14 1110 112 16 E
15 1111 120 17 F
16 10000 121 20 10
17 10001 122 21 11
18 10010 200 22 12
19 10011 201 23 13
20 10100 202 24 14
JavaScript Base Conversion Calculator (This converts non-integer values & negative bases too!)
 from base to base value to convert
Caution: due to CPU restrictions, some rounding has been known to occur for numbers spanning greater than 12 base10 digits, 13 hexadecimal digits or 52 binary digits. Just like a regular calculator, rounding can occur.