20679805266 has 32 divisors (see below), whose sum is σ = 42089760000. Its totient is φ = 6771738960.

The previous prime is 20679805259. The next prime is 20679805271. The reversal of 20679805266 is 66250897602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511161 + ... + 550131.

It is an arithmetic number, because the mean of its divisors is an integer number (1315305000).

Almost surely, 2^20679805266 is an apocalyptic number.

20679805266 is an abundant number, since it is smaller than the sum of its proper divisors (21409954734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20679805266 is a wasteful number, since it uses less digits than its factorization.

20679805266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40534.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 20679805266 in words is "twenty billion, six hundred seventy-nine million, eight hundred five thousand, two hundred sixty-six".