Twenty-twos

Twenty-twos is equal to \(2 \lfloor 10^{20} / 9\rfloor\), or 20 copies of 2:


 * 22222222222222222222 or hypermathematically by interior superscription as \(2^{18}2\)
 * googology

Its prime factorization is 2 × 11 × 41 × 101 × 271 × 3541 × 9091 × 27961.

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