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18 (eighteen) is a positive integer following 17 and preceding 19. Its ordinal form is written "18th" or "eighteenth".

Properties Edit

18 is an even composite number.

In googology Edit

In Greek-based number-naming systems, 18 is associated with prefix "octadeka-", and with prefix "octodeci-" in Latin systems.

Cultural significance Edit

It is associated with adult-only media, and also with neo-Nazism.

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