20664668908 has 24 divisors (see below), whose sum is σ = 39008544848. Its totient is φ = 9521966016.

The previous prime is 20664668891. The next prime is 20664668911. The reversal of 20664668908 is 80986646602.

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, 292266 + ... + 356017.

Almost surely, 2^20664668908 is an apocalyptic number.

It is an amenable number.

20664668908 is a deficient number, since it is larger than the sum of its proper divisors (18343875940).

20664668908 is a wasteful number, since it uses less digits than its factorization.

20664668908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648913 (or 648911 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 20664668908 in words is "twenty billion, six hundred sixty-four million, six hundred sixty-eight thousand, nine hundred eight".