## FANDOM

10,407 Pages

A quintillion is equal to 1018 in America, or 1030 in France and Germany.[1]

Written out in decimal form quintillion (in the short scale) is:

1000000000000000000

In long scale:

1000000000000000000000000000000

This number is also called hexillion in Russ Rowlett's Greek-based naming system.[2]

Aarex Tiaokhiao calls this number hetillion.[3] He also gave name ocdoocol and 18-noogol, referring to the short scale value of this number.[4]

## Examples

• Niagara Falls takes up 210,000 years (about 30 times all recorded history) to use up a quintillion gallons of water.
• A single drop of water contains 1.7 quintillion water molecules.
• The distance from the Milky way to Andromeda is 2 million light years, which is about 11.73 quintillion miles.
• The entire Earth contains about 326 quintillion gallons of water.[5]
• There are about 43.3 quintillion ways to arrange a 3×3×3 Rubik's Cube.[6]
• The SI prefix exa- multiplies by one quintillion.
• The Earth's cross section has an area of about 1.275 quintillion square centimeters. [7]
• By one estimate, there are 20 quintillion living animals on Earth.[8]
• a tower of a quintillion one dollar bills would aproximately measure 1.099*10^20m in height.

## As a banknote denomination

Only the Hungarian pengő had banknotes with this number in the denomination.

## Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{18}$$
Arrow notation $$10\uparrow18$$
Steinhaus-Moser Notation 15[3] 16[3]
Copy notation 9[18] 1[19]
Taro's multivariable Ackermann function A(3,56) A(3,57)
Pound-Star Notation #*(4,1,3)*6 #*(3,1)*13
BEAF {10,18}
Hyper-E notation E18
Bashicu matrix system (0)(0)[31622] (0)(0)[31623]
Hyperfactorial array notation 19! 20!
Fast-growing hierarchy $$f_2(54)$$ $$f_2(55)$$
Hardy hierarchy $$H_{\omega^2}(54)$$ $$H_{\omega^2}(55)$$
Slow-growing hierarchy $$g_{\omega^{\omega+8}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{30}$$
Arrow notation $$10\uparrow30$$
Steinhaus-Moser Notation 22[3] 23[3]
Copy notation 9[30] 1[31]
Taro's multivariable Ackermann function A(3,96) A(3,97)
Pound-Star Notation #*(9,6,4)*9 #*(0,1,0,0,1)*5
BEAF {10,30}
Hyper-E notation E30
Bashicu matrix system (0)(0)(0)[5623] (0)(0)(0)[5624]
Hyperfactorial array notation 28! 29!
Fast-growing hierarchy $$f_2(93)$$ $$f_2(94)$$
Hardy hierarchy $$H_{\omega^2}(93)$$ $$H_{\omega^2}(94)$$
Slow-growing hierarchy $$g_{\omega^{\omega3}}(10)$$