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19 (nineteen) is a positive integer following 18 and preceding 20. Its ordinal form is written "19th" or "ninteenth".

Properties Edit

19 is an odd prime number.

19 is the 7th Mersenne exponent.

In googology Edit

19

In Greek-based number-naming systems, 19 is associated with prefix "enneadeka-", and with prefix "novemdeci-" in Latin systems.

Its Roman numeral (XIX) is used in Fibonaxix.

In popular culture Edit