💰 1,000,000,000,000,000 🇬🇧 1 with 24 zeros

quadrillion

1 8.0

The number 1 followed by 24 zeros, used in older British number system

noun
/kwɑːˈdrɪljən/

Archaic

: cuatrillón

NASA's budget for the new space project is estimated at over 1 quadrillion dollars.

Examples

Global carbon emissions are expected to rise to 2 quadrillion grams by 2050.
Unless right now somebody is thinking of that very number, the third prime number after 27 quadrillion doesn't exist.

Blog text (8)
The national debt reached an astonishing quadrillion dollars last year.

Synonyms

septillion

vsquadrillion

1 9.9

A very large number that is 1 followed by twenty four zeros

has identical value but is the British name for that number

Surface Forms

quadrillion singular

quadrillions plural

Morphology

quadrillion = million (semi-transparent) = quadri + million

The morphology signals the 'quadri-' element plus the '-illion' series, but this sense follows the long-scale convention (10^24), so learners cannot derive the exact power of ten from the parts without knowing scale conventions.

Etymology

Quadrillion comes from the Latin root quadri- meaning 'four' and the familiar -illion from million, because it is the fourth large number name after million. In older British use it meant 1 followed by 24 zeros, a 'million millions of millions'.