A quadrillion is 1 000 000 000 000 000 or 1015
Nowadays, all countries use the US definition of large numbers such as a billion (thousand million), trillion (thousand billion or million million) etc.
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A 1 followed by 16 zeroes. 10,000,000,000,000,000 "ten quadrillion"
10^16 = 10,000,000,000,000,000 (ten quadrillion).
The answer is 10,000,000,000,000,000 (ten quadrillion).
10,000,000,000,000,000 is written as ten quadrillion.
Ten million billion looks like this: 10,000,000,000,000,000 (10 quadrillion).