# l28

The numbers with a 28 subscript use Base 28 Octovigesimal notation.

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

## Nearby Numbers

Positive, nonzero integers within three units

18
i28
Eightteen in Base 28 Octovigesimal
19
j28
Nineteen in Base 28 Octovigesimal
20
k28
Twenty in Base 28 Octovigesimal
22
m28
Twenty-Two in Base 28 Octovigesimal
23
n28
Twenty-Three in Base 28 Octovigesimal
24
o28
Twenty-Four in Base 28 Octovigesimal

## Scientific Notation

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

## Reciprocal

A number multiplied with its reciprocal is one.

### `0.19999999999928`

The reciprocal of 21 in Base 28 Octovigesimal.

## Palindrome?

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

The number l28 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 28 Octovigesimal

## 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
328
Three in Base 28 Octovigesimal
7
728
Seven in Base 28 Octovigesimal

## Prime Factorization

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

## Base Conversions

The number twenty-one in 35 different bases