# 220

The numbers with a 20 subscript use Base 20 Vigesimal notation.

For more familiar numbers: See Two in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

3
320
Three in Base 20 Vigesimal
4
420
Four in Base 20 Vigesimal
5
520
Five in Base 20 Vigesimal

## 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.a20`

The reciprocal of 2 in Base 20 Vigesimal.

## Palindrome?

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

The number 220 is a palindrome.

## A Prime Number

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

Two is the 1st prime number.   See primes in Base 20 Vigesimal

## Not A Composite

Composites have more than just these two factors.

Two is not a composite number because it has exactly two factors: One and Two

## Prime Factors

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

The number two has the following 1 prime factor:

2
220
Two in Base 20 Vigesimal

## Prime Factorization

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

## Base Conversions

The number two in 35 different bases