# 1218

The numbers with a 18 subscript use Base 18 Octodecimal notation.

For more familiar numbers: See Twenty in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

17
h18
Seventeen in Base 18 Octodecimal
18
1018
Eightteen in Base 18 Octodecimal
19
1118
Nineteen in Base 18 Octodecimal
21
1318
Twenty-One in Base 18 Octodecimal
22
1418
Twenty-Two in Base 18 Octodecimal
23
1518
Twenty-Three in Base 18 Octodecimal

## 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.

### `0.0g3ae73ae73ae618`

The reciprocal of 20 in Base 18 Octodecimal.

## Palindrome?

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

The number 1218 is not a palindrome.

## Not A Prime Number

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

Twenty is a composite number with 6 total factors (including 1 and itself).   See primes in Base 18 Octodecimal

## A Composite

Composites have more than just these two factors.

Twenty is a composite number with 6 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 has the following 2 prime factors:

2
218
Two in Base 18 Octodecimal
5
518
Five in Base 18 Octodecimal

## 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 in 35 different bases