what is 10^20?
The largest denomination banknote ever officially issued for circulation was in 1946 by the Hungarian National Bank for the amount of 100 quintillion pengő (100,000,000,000,000,000,000, or 10^20; 100 million million million) image.
(A banknote worth 10 times as much, 1021 (1 sextillion) pengő, was printed but not issued .
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