Nearby Numbers

Positive, nonzero integers within three units

21025

Twenty-One Thousand and Twenty-Five

21026

Twenty-One Thousand and Twenty-Six

21027

Twenty-One Thousand and Twenty-Seven

21029

Twenty-One Thousand and Twenty-Nine

21030

Twenty-One Thousand and Thirty

21031

Twenty-One Thousand and Thirty-One

Scientific Notation

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

2.1028e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000047555640098915734

The reciprocal of 21028.

Palindrome?

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

The number 21028 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 twenty-eight is a composite number with 12 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 twenty-eight is a composite number with 12 total factors (including 1 and itself).

Prime Factors

2

Two

7

Seven

751

Seven Hundred and Fifty-One

Prime Factorization

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

22 · 71 · 7511 = 21028

Base Conversions

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