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The names of large numbers used world-wide is not consistent. That is, there is no universally accepted naming system. The American
influence on the world markets has had the effect of imposing more of it's language on the rest of the world. Therefore, more and more places
world-wide, are adopting the American terms. The last column has the suggested terms we might use to integrate a Greek-based prefix system.
We'll see how it all turns out...

n =

103n =

American
name

European
name

SI prefix

Greek-based
name
(proposed)
3

109

billion
milliard

giga-

gillion
4

1012

trillion
billion

tera-

tetrillion
5

1015

quadrillion
billiard

peta-

pentillion
6

1018

quintillion
trillion

exa-

hexillion
7

1021

sextillion
trilliard

zetta-

heptillion
8

1024

septillion
quadrillion

yotta-

oktillion
9

1027

octillion
quadrilliard

 

ennillion
10

1030

nonillion
quintillion

 

dekillion
11

1033

decillion
quintilliard

 

hendekillion
12

1036

undecillion
sextillion

 

dodekillion
13

1039

duodecillion
sextilliard

 

trisdekillion
14

1042

tredecillion
septillion

 

tetradekillion
15

1045

quattuordecillion
septilliard

 

pentadekillion
16

1048

quindecillion
octillion

 

hexadekillion
17

1051

sexdecillion
octilliard

 

heptadekillion
18

1054

septendecillion
nonillion

 

oktadekillion
19

1057

octodecillion
nonilliard

 

enneadekillion
20

1060

novemdecillion
decillion

 

icosillion
21

1063

vigintillion
decilliard

 

icosihenillion
22

1066

unvigintillion
undecillion

 

icosidillion
23

1069

duovigintillion
undecilliard

 

icositrillion
24

1072

trevigintillion
duodecillion

 

icositetrillion
25

1075

quattuorvigintillion
duodecilliard

 

icosipentillion
26

1078

quinvigintillion
tredecillion

 

icosihexillion
27

1081

sexvigintillion
tredecilliard

 

icosiheptillion
28

1084

septenvigintillion
quattuordecillion

 

icosioktillion
29

1087

octovigintillion
quattuordecilliard

 

icosiennillion

30

1090

novemvigintillion

quindecillion

 

triacontillion

31

1093

trigintillion

quindecilliard

 

triacontahenillion

32

1096

untrigintillion
sexdecillion

 

triacontadillion
33

1099

duotrigintillion
sexdecilliard

 

triacontatrillion