The Number

4000

Four Thousand

In Base 21 Unovigesimal Is

91a21

The numbers with a 21 subscript use Base 21 Unovigesimal notation.

For more familiar numbers: See Four Thousand in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

3997
91721
Three Thousand Nine Hundred and Ninety-Seven in Base 21 Unovigesimal
3998
91821
Three Thousand Nine Hundred and Ninety-Eight in Base 21 Unovigesimal
3999
91921
Three Thousand Nine Hundred and Ninety-Nine in Base 21 Unovigesimal
4001
91b21
Four Thousand and One in Base 21 Unovigesimal
4002
91c21
Four Thousand and Two in Base 21 Unovigesimal
4003
91d21
Four Thousand and Three in Base 21 Unovigesimal

Scientific Notation

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

4e3

Reciprocal

A number multiplied with its reciprocal is one.

0.0026d0b2hdbbdi221

The reciprocal of 4000 in Base 21 Unovigesimal.

Palindrome?

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

The number 91a21 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Four thousand is a composite number with 24 total factors (including 1 and itself).   See primes in Base 21 Unovigesimal

A Composite

Composites have more than just these two factors.

Four thousand is a composite number with 24 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number four thousand has the following 2 prime factors:

2
221
Two in Base 21 Unovigesimal
5
521
Five in Base 21 Unovigesimal

Prime Factorization

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

2215 · 5213 = 91a21

Base Conversions

The number four thousand in 35 different bases