Nearby Numbers

Positive, nonzero integers within three units

21007

Twenty-One Thousand and Seven

21008

Twenty-One Thousand and Eight

21009

Twenty-One Thousand and Nine

21011

Twenty-One Thousand and Eleven

21012

Twenty-One Thousand and Twelve

21013

Twenty-One Thousand and Thirteen

Scientific Notation

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

2.1010e4

Reciprocal

A number multiplied with its reciprocal is one.

0.00004759638267491671

The reciprocal of 21010.

Palindrome?

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

The number 21010 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 ten is a composite number with 16 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 ten is a composite number with 16 total factors (including 1 and itself).

Prime Factors

2

Two

5

Five

11

Eleven

191

One Hundred and Ninety-One

Prime Factorization

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

21 · 51 · 111 · 1911 = 21010

Base Conversions

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