20705166992 has 40 divisors (see below), whose sum is σ = 40271946240. Its totient is φ = 10312473600.

The previous prime is 20705166971. The next prime is 20705167009. The reversal of 20705166992 is 29966150702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10611617 + ... + 10613567.

It is an arithmetic number, because the mean of its divisors is an integer number (1006798656).

Almost surely, 2^20705166992 is an apocalyptic number.

It is an amenable number.

20705166992 is a deficient number, since it is larger than the sum of its proper divisors (19566779248).

20705166992 is a wasteful number, since it uses less digits than its factorization.

20705166992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 4185 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 20705166992 in words is "twenty billion, seven hundred five million, one hundred sixty-six thousand, nine hundred ninety-two".