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30 (thirty) is a positive integer following 29 and preceding 31. Its ordinal form is written "30th" or "thirtieth".

## Properties

30 is an even composite number and equal to five primorial, and its prime factorization is $$2\times 3\times 5$$.

## In googology

• In Greek-based number-naming systems, 30 is associated with prefix "triaconta-", and with prefix "triginti-" in Latin systems.
• In the Misalian seximal system, this number is called "fifsy", because it's five times six.
• Nirvana Supermind coined zero-ternol for this number and is equal to Q<10,3> in quick array notation.[1]

## As a banknote denomination

The Tunisian dinar had banknotes with this number in the denomination.

## Sources

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