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Number 18: mathematical and symbolic properties | Crazy Numbers

Discover a lot of information on the number 18: properties, mathematical operations, how to write it, symbolism, numerology, representations and many other interesting things!

Mathematical properties of 18

Is 18 a prime number? No
Is 18 a perfect number? No
Number of divisors 6
List of dividers
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1, 2, 3, 6, 9, 18
Sum of divisors 39
Prime factorization 2 x 32
Prime factors
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2, 3

How to write / spell 18 in letters?

In letters, the number 18 is written as: Eighteen. And in other languages? how does it spell?

18 in other languages
Write 18 in english Eighteen
Write 18 in french Dix-huit
Write 18 in spanish Dieciocho
Write 18 in portuguese Dezoito

Decomposition of the number 18

The number 18 is composed of:

1 iteration of the number 1 : The number 1 (one) represents the uniqueness, the unique, a starting point, a beginning.... Find out more about the number 1

1 iteration of the number 8 : The number 8 (eight) represents power, ambition. It symbolizes balance, realization.... Find out more about the number 8

Other ways to write 18
In letter Eighteen
In roman numeral
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XVIII
In binary 10010
In octal 22