Nearby Numbers

Positive, nonzero integers within three units

21078

Twenty-One Thousand and Seventy-Eight

21079

Twenty-One Thousand and Seventy-Nine

21080

Twenty-One Thousand and Eighty

21082

Twenty-One Thousand and Eighty-Two

21083

Twenty-One Thousand and Eighty-Three

21084

Twenty-One Thousand and Eighty-Four

Scientific Notation

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

2.1081e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000047436079882358525

The reciprocal of 21081.

Palindrome?

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

The number 21081 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 eighty-one is a composite number with 4 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 eighty-one is a composite number with 4 total factors (including 1 and itself).

Prime Factors

3

Three

7027

Seven Thousand and Twenty-Seven

Prime Factorization

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

31 · 70271 = 21081

Base Conversions

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