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2023-08-07 Updated 2023-10-27 informational Edit on GitHub

What comes after quadrillion?

After quadrillion comes quintillion, with 18 zeroes. Discover the full list of large number names from million all the way to centillion.

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This is quite a frequent question. You’ve got:

  • million (6 zeroes)
  • billion (9 zeroes)
  • trillion (12 zeroes)
  • quadrillion (15 zeroes)

But what comes after quadrillion?

The answer is: quintillion. A quintillion has 18 zeroes. That’s a lot of zeroes: 1.000.000.000.000.000.000.

But there’s more. If you look past the quintillion, you’ve got:

  • sextillion (21 zeroes)
  • septillion (24 zeroes)
  • octillion (27 zeroes)
  • nonillion (30 zeroes)
  • decillion (33 zeroes)
  • undecillion (36 zeroes)
  • duodecillion (39 zeroes)
  • tredecillion (42 zeroes)
  • quattuordecillion (45 zeroes)
  • quindecillion (48 zeroes)
  • sexdecillion (51 zeroes)
  • septendecillion (54 zeroes)
  • octodecillion (57 zeroes)
  • novemdecillion (60 zeroes)
  • vigintillion (63 zeroes)
  • centillion (303 zeroes)

Interested in how long it would take a PC to count to a trillion? Check out this article: Counting up to one trillion.

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