Quadrillion

The term quadrillion can mean more than one thing.

• In Canadian and U.S usage, one quadrillion is 1,000,000,000,000,000, or 10¹⁵. While Britain, Australia and New Zealand traditionally employed the European usage, they have recently largely switched to the U.S. version.
• In traditional European usage, one quadrillion is 10²⁴.

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