The Number

21

Twenty-One

In Base 24 Tetravigesimal Is

l24

The numbers with a 24 subscript use Base 24 Tetravigesimal notation.

For more familiar numbers: See Twenty-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

18
i24
Eightteen in Base 24 Tetravigesimal
19
j24
Nineteen in Base 24 Tetravigesimal
20
k24
Twenty in Base 24 Tetravigesimal
22
m24
Twenty-Two in Base 24 Tetravigesimal
23
n24
Twenty-Three in Base 24 Tetravigesimal
24
1024
Twenty-Four in Base 24 Tetravigesimal

Scientific Notation

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

2.1e1

Reciprocal

A number multiplied with its reciprocal is one.

0.13a6kdh3a6kdf24

The reciprocal of 21 in Base 24 Tetravigesimal.

Palindrome?

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

The number l24 is a palindrome.

Not A Prime Number

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

Twenty-one is a composite number with 4 total factors (including 1 and itself).   See primes in Base 24 Tetravigesimal

A Composite

Composites have more than just these two factors.

Twenty-one is a composite number with 4 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 twenty-one has the following 2 prime factors:

3
324
Three in Base 24 Tetravigesimal
7
724
Seven in Base 24 Tetravigesimal

Prime Factorization

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

3241 · 7241 = l24

Base Conversions

The number twenty-one in 35 different bases