### The Number

# 21970

## Twenty-One Thousand Nine Hundred and Seventy

## In Base 13 Tridecimal Is

# a00013

The numbers with a 13 subscript use Base 13 Tridecimal notation.

For more familiar numbers: See Twenty-One Thousand Nine Hundred and Seventy in Base 10 Decimal

## Nearby Numbers

*Positive, nonzero integers within three units*

## Scientific Notation

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

`2.1970e4`

## Reciprocal

*A number multiplied with its reciprocal is one.*

`0.00013b913b913b913c13`

The reciprocal of 21970 in Base 13 Tridecimal.

## Palindrome?

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

The number a00013 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 nine hundred and seventy is a composite number with 16 total factors (including 1 and itself). See primes in Base 13 Tridecimal

## A Composite

*Composites have more than just these two factors.*

Twenty-one thousand nine hundred and seventy is a composite number with 16 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 thousand nine hundred and seventy has the following 3 prime factors:

## Prime Factorization

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

###
```
2131
·
5131
·
10133
= a00013
```

## Base Conversions

*The number twenty-one thousand nine hundred and seventy in 35 different bases*