Katrillion vs. Quadrillion

Katrillionnoun

An unspecified large number (of).

Quadrillionnumeral

A thousand trillion: 1 followed by fifteen zeros, 1015.

Quadrillionnumeral

A million trillion: 1 followed by twenty-four zeros, 1024.

Quadrillionnoun

Any very large number, exceeding normal description.

Quadrillionnoun

According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.

Quadrillionnoun

the number that is represented as a one followed by 24 zeros;

Quadrillionnoun

the number that is represented as a one followed by 15 zeros