# 20018

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

For more familiar numbers: See Six Hundred and Forty-Eight in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

645
1hf18
Six Hundred and Forty-Five in Base 18 Octodecimal
646
1hg18
Six Hundred and Forty-Six in Base 18 Octodecimal
647
1hh18
Six Hundred and Forty-Seven in Base 18 Octodecimal
649
20118
Six Hundred and Forty-Nine in Base 18 Octodecimal
650
20218
Six Hundred and Fifty in Base 18 Octodecimal
651
20318
Six Hundred and Fifty-One 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.

### `0.00918`

The reciprocal of 648 in Base 18 Octodecimal.

## Palindrome?

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

The number 20018 is not a palindrome.

## Not A Prime Number

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

Six hundred and forty-eight is a composite number with 20 total factors (including 1 and itself).   See primes in Base 18 Octodecimal

## A Composite

Composites have more than just these two factors.

Six hundred and forty-eight is a composite number with 20 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 six hundred and forty-eight has the following 2 prime factors:

2
218
Two in Base 18 Octodecimal
3
318
Three 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 six hundred and forty-eight in 35 different bases