نام‏های اعداد دهدهی بزرگ در سیستم شمارش امریکایی و سیستم شمارش اروپایی (ایرانی)

 

 

USA (103+3n)

UK (106n)

SI Prefix

Symbol

10-24

septillionth

quadrillionth

Yocto-

y

10-21

sextillionth

trilliardth

Zepto-

z

10-18

quintillionth

trillionth

Atto-

a

10-15

quadrillionth

billiardth

Femto-

f

10-12

trillionth

billionth

Pico-

p

10-9

billionth

milliardth

Nano-

n

10-6

millionth

Micro-

µ

10-5

hundred thousandth

   

10-4

ten thousandth

   

10-3

thousandth

Milli-

m

10-2

hundredth

Centi-

c

10-1

tenth

Deci-

d

100

one

   

101

ten

Deka-
Deca-

dk

102

hundred

Hecto-

h

103

thousand

Kilo-

k

104

ten thousand

Myria-

ma

105

hundred thousand

Hectokilo-

hk

106

million

Mega-

M

109

billion

milliard

Giga-

G

1012

trillion

billion

Tera-

T

1015

quadrillion

billiard

Peta-

P

1018

quintillion

trillion

Exa-

E

1021

sexillion

trilliard

Zetta-

Z

1024

septillion

quadrillion

Yotta-

Y

1027

octillion

quadrilliard

   

1030

nonillion

quintillion

   

1033

decillion

quintilliard

   

1036

undecillion

sextillion

   

1039

duodecillion

sextilliard

   

1042

tredecillion

septillion

   

...

...

...

   

10100

googol
(10 duotrigintillion)

googol
(10 sexdecilliard)

   

10102

tretrigintillion

septendecillion

   

10105

quattuortrigintillion

septendecilliard

   

10108

quintrigintillion

octodecillion

   

...

...

...

   

10300

novemnonagintillion

quinquagintillion

   

10303

centillion

quinquagintilliard

   

...

...

...

   

10600

 

centillion

   

10603

ducentillion

     

...

...

...

   

10903

trecentillion

     

...

...

...

   

10googol

googolplex

googolplex

1 followed by googol zeros

106n

(2n-1)-illion

n-illion

   

106n+3

(2n)-illion

n-illiard

   

 

  • 10n  is called   n-plex

  • 10-n = 1 / 10n is called   n-minex