

Numerical Prefixes: Mathematical, Digital, IEC 

These are the commonly used numerical prefixes in the English language, but most seem to translate with European languages.
vendeko 
v 
decillionth 
10^{33} 


nonillionth 
10^{30} 
xenno 
x 
octillionth 
10^{27} 
yocto 
y 
septillionth 
10^{24} 
zepto 
z 
sextillionth 
10^{21} 
atto 
a 
quintillionth 
10^{18} 
femto 
f 
quadrillionth 
10^{15} 
pico 
p 
trillionth 
10^{12} 
nano 
n 
billionth 
10^{9} 
micro 
µ 
millionth 
10^{6} 
milli 
m 
thousandth 
10^{3} 
centi 
c 
hundredth 
10^{2} 
deci 
d 
tenth 
10^{1} 
deka 
da 
ten 
10^{1} 
hecto 
h 
hundred 
10^{2} 
kilo 
k 
thousand 
10^{3} 
mega 
M 
million 
10^{6} 
giga 
G 
billion^{†} 
10^{9} 
tera 
T 
trillion^{†} 
10^{12} 
peta 
P 
quadrillion 
10^{15} 
exa 
E 
quintillion 
10^{18} 
zetta 
Z 
sextillion 
10^{21} 
yotta 
Y 
septillion 
10^{24} 
xenna 
X 
octillion 
10^{27} 

V 
nonillion 
10^{30} 
vendeka 
V 
decillion 
10^{33} 


undecillion 
10^{36} 


duodecillion 
10^{39} 


tredecillion 
10^{42} 


quattodecillion 
10^{45} 


quindecillion 
10^{48} 


sexdecillion 
10^{51} 


septendecillion 
10^{54} 


octodecillion 
10^{57} 


novemdecillion 
10^{60} 


vigindecillion 
10^{63} 


googol 
10^{100} 


googolplex 
10^{google} 
peta 
P 
2^{50} 
1,125,899,906,842,624 
tera 
T 
2^{40} 
1,099,511,627,776 
giga 
G 
2^{30} 
1,073,741,824 
Mega 
M 
2^{20} 
1,048,576 
kilo 
k 
2^{10} 
1,024 
exbi 
Ei 
2^{60} 
1,152,921,504,606,846,976 
pebi 
Pi 
2^{50} 
1,125,899,906,842,624 
tebi 
Ti 
2^{40} 
1,099,511,627,776 
gibi 
Gi 
2^{30} 
1,073,741,824 
mebi 
Mi 
2^{20} 
1,048,576 
kibi 
Ki 
2^{10} 
1,024 
uni, mono 
1 
bi 
2 
tri 
3 
quadr 
4 
quint, penta 
5 
hex, sex 
6 
hept, sept 
7 
octo 
8 
novem 
9 
deca, deka 
10 
† 1,000,000,000 is called "one billion" in the U.S., U.K., France (before May 3, 1961), Brazil, Puerto Rico, Greece,
and in Italy, Russia and Turkey it is referred to as "one billion" when written out, but as "one milliard" when written as 10^{9}.
1,000,000,000,000 is called "one trillion" in the U.S., but is called "one billion" in Germany, the Netherlands, Austria, Sweden, Norway,
Denmark, Finland, France (after May 3, 1961), Portugal, Poland. It is best to check for current definitions for each country
to be certain to get it right, or better yet, just write it out numerically to avoid confusion.
Thanks to Duncan for the zepto info.



