How long is one quadrillion seconds?

Answer 1

20 million years

Answer 2

A quadrillion is 10 to the 15th power. This is illustrated even more when you convert that to years (in seconds, not days).

1 year = 365 days. 365 days is 31,536,000 seconds (60 seconds * 60 minutes * 24 days * 365 days).

10 to the 15th power divided by 31,536,000 seconds = 31709791.983764585 years. Rounded up that is 31,709,792 years.