Nearby Numbers

Positive, nonzero integers within three units

21088

Twenty-One Thousand and Eighty-Eight

21089

Twenty-One Thousand and Eighty-Nine

21090

Twenty-One Thousand and Ninety

21092

Twenty-One Thousand and Ninety-Two

21093

Twenty-One Thousand and Ninety-Three

21094

Twenty-One Thousand and Ninety-Four

Scientific Notation

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

2.1091e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000047413588734531315

The reciprocal of 21091.

Palindrome?

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

The number 21091 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 ninety-one is a composite number with 8 total factors (including 1 and itself).   See primes in Base 10 Decimal

A Composite

Composites have more than just these two factors.

Twenty-one thousand and ninety-one is a composite number with 8 total factors (including 1 and itself).

Prime Factors

7

Seven

23

Twenty-Three

131

One Hundred and Thirty-One

Prime Factorization

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

71 · 231 · 1311 = 21091

Base Conversions

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