Nearby Numbers

Positive, nonzero integers within three units

21015

25df21

Twenty-One Thousand and Fifteen in Base 21 Unovigesimal

21016

25dg21

Twenty-One Thousand and Sixteen in Base 21 Unovigesimal

21017

25dh21

Twenty-One Thousand and Seventeen in Base 21 Unovigesimal

21019

25dj21

Twenty-One Thousand and Nineteen in Base 21 Unovigesimal

21020

25dk21

Twenty-One Thousand and Twenty in Base 21 Unovigesimal

21021

25e021

Twenty-One Thousand and Twenty-One in Base 21 Unovigesimal

Scientific Notation

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

2.1018e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000956ce1b39k0k21

The reciprocal of 21018 in Base 21 Unovigesimal.

Palindrome?

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

The number 25di21 is not a palindrome.

Not A Prime Number

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

Twenty-one thousand and eightteen is a composite number with 16 total factors (including 1 and itself).   See primes in Base 21 Unovigesimal

A Composite

Composites have more than just these two factors.

Twenty-one thousand and eightteen is a composite number with 16 total factors (including 1 and itself).

Prime Factors

2

221

Two in Base 21 Unovigesimal

3

321

Three in Base 21 Unovigesimal

31

1a21

Thirty-One in Base 21 Unovigesimal

113

5821

One Hundred and Thirteen in Base 21 Unovigesimal

Prime Factorization

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

2211 · 3211 · 1a211 · 58211 = 25di21

Base Conversions

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