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quintillion

quintillion

1 8.4
A number equal to one followed by 18 zeros
  • noun
  • /kwɪnˈtɪljən/
translation icon : quintillón
  • The total estimated number of ants on Earth is about 20 quintillion.
  • one quintillion
  • 1 quintillion
  • 18 quintillion

Might be, you know, a quintillion characters long.

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Examples

  • Their energies could be a whopping one quintillion times the luminosity of the Sun.

    Academic text (1994)
  • If printed out, it would be something like 500 quintillion pages of text.

    Blog text (18)
  • Ten quintillion op-eds a day, so it's ten quintillion to one.

    Fiction book (2001)
  • You're lifting 200 quintillion tons.

  • 1 exabyte = 1,000,000,000,000,000,000 bytes; that's 1 quintillion bytes.

    Blog text (18)
  • Scientists estimate that there are approximately 10 quintillion stars in the Milky Way galaxy.

  • A quintillion is the number written as 1 followed by 18 zeros.

Synonyms

trillion
vsquintillion
  • Archaic
9.9

In old British use, a number equal to one million million million, written 1,000,000,000,000,000,000

is the current standard name for the same number

How Big

quintillion
1 8.4
quadrillion
1 7.5
trillion
21 2.8
billion
330 1.0
million
  • Informal
417 1.0
thousand
1.0

Surface Forms

quintillion singular
quintillions plural

Morphology

quintillion = quint + illion

The form shows the numeric prefix 'quint-' (five) combined with the '-illion' number-naming pattern, so the morphological pattern is visible, but the exact value (10^18) depends on learning the naming convention rather than simple composition.

Etymology

Quintillion comes from the prefix quint- meaning 'five', shown in words like quintet, and the familiar ending -illion from million. So it is the 'fifth' big number after million, billion, and trillion, which is why it means a one with eighteen zeros.