How many 0s is quadr illion?

Answer 1

Quadrillion may mean either of the two numbers (see long and short scales for more detail): * 1,000,000,000,000,000 (one thousand million million; 1015; SI prefix peta-) - for all short scale countries - increasingly common meaning in English language usage * 1,000,000,000,000,000,000,000,000 (one million million million million; 1024; SI prefix: yotta-) - for all long scale countries - increasingly rare meaning in English language usage .