The Number

81018

Eighty-One Thousand and Eightteen

In Base 20 Vigesimal Is

a2ai20

The numbers with a 20 subscript use Base 20 Vigesimal notation.

For more familiar numbers: See Eighty-One Thousand and Eightteen in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

81015
a2af20
Eighty-One Thousand and Fifteen in Base 20 Vigesimal
81016
a2ag20
Eighty-One Thousand and Sixteen in Base 20 Vigesimal
81017
a2ah20
Eighty-One Thousand and Seventeen in Base 20 Vigesimal
81019
a2aj20
Eighty-One Thousand and Nineteen in Base 20 Vigesimal
81020
a2b020
Eighty-One Thousand and Twenty in Base 20 Vigesimal
81021
a2b120
Eighty-One Thousand and Twenty-One in Base 20 Vigesimal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

8.1018e4

Reciprocal

A number multiplied with its reciprocal is one.

0.0001j9ij360jg33c20

The reciprocal of 81018 in Base 20 Vigesimal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number a2ai20 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Eighty-one thousand and eightteen is a composite number with 24 total factors (including 1 and itself).   See primes in Base 20 Vigesimal

A Composite

Composites have more than just these two factors.

Eighty-one thousand and eightteen is a composite number with 24 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number eighty-one thousand and eightteen has the following 4 prime factors:

2
220
Two in Base 20 Vigesimal
3
320
Three in Base 20 Vigesimal
7
720
Seven in Base 20 Vigesimal
643
1c320
Six Hundred and Forty-Three in Base 20 Vigesimal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

2201 · 3202 · 7201 · 1c3201 = a2ai20

Base Conversions

The number eighty-one thousand and eightteen in 35 different bases