Nearby Numbers

Positive, nonzero integers within three units

21638

Twenty-One Thousand Six Hundred and Thirty-Eight

21639

Twenty-One Thousand Six Hundred and Thirty-Nine

21640

Twenty-One Thousand Six Hundred and Forty

21642

Twenty-One Thousand Six Hundred and Forty-Two

21643

Twenty-One Thousand Six Hundred and Forty-Three

21644

Twenty-One Thousand Six Hundred and Forty-Four

Scientific Notation

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

2.1641e4

Reciprocal

A number multiplied with its reciprocal is one.

0.00004620858555519616

The reciprocal of 21641.

Palindrome?

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

The number 21641 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 six hundred and forty-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 six hundred and forty-one is a composite number with 8 total factors (including 1 and itself).

Prime Factors

17

Seventeen

19

Nineteen

67

Sixty-Seven

Prime Factorization

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

171 · 191 · 671 = 21641

Base Conversions

The number twenty-one thousand six hundred and forty-one in 35 different bases