20671100656 has 40 divisors (see below), whose sum is σ = 40316739008. Its totient is φ = 10266912000.

The previous prime is 20671100641. The next prime is 20671100713. The reversal of 20671100656 is 65600117602.

It is a happy number.

It is a congruent number.

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, 2953321 + ... + 2960311.

Almost surely, 2^20671100656 is an apocalyptic number.

It is an amenable number.

20671100656 is a deficient number, since it is larger than the sum of its proper divisors (19645638352).

20671100656 is a wasteful number, since it uses less digits than its factorization.

20671100656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 20671100656 in words is "twenty billion, six hundred seventy-one million, one hundred thousand, six hundred fifty-six".