20664058634 has 16 divisors (see below), whose sum is σ = 32747155200. Its totient is φ = 9763501104.

The previous prime is 20664058577. The next prime is 20664058673. The reversal of 20664058634 is 43685046602.

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, 3787454 + ... + 3792905.

It is an arithmetic number, because the mean of its divisors is an integer number (2046697200).

Almost surely, 2^20664058634 is an apocalyptic number.

20664058634 is a deficient number, since it is larger than the sum of its proper divisors (12083096566).

20664058634 is a wasteful number, since it uses less digits than its factorization.

20664058634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580437.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 20664058634 in words is "twenty billion, six hundred sixty-four million, fifty-eight thousand, six hundred thirty-four".