# Fundamental Mathematics/Arithmetic/Arithmetic Number/Natural Number

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## Natural numbers[edit | edit source]

The numbers which are generally used in our day to day life for counting are termed as natural numbers. They are also referred to as "counting" numbers.

- N = {1,2,3,4,5,6...}

Sometime the **0** is used. this make the **whole** number.

## Even numbers[edit | edit source]

Number divides by 2 without remainder . Even number is denotes as **2N**

- 2N = {2,4,6,8..}

## Odd numbers[edit | edit source]

Number divides by 2 with remainder Odd number is denotes as **2N+1**

- 2N + 1 = {1,3,5,7,9...}

## Prime numbers[edit | edit source]

Number divides by 1 and itself without remainder. and is >=2 Prime number is denoted as **P**

- P = {2,3,5,7,...}