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


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.


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