18656372012 has 48 divisors (see below), whose sum is σ = 34024193280. Its totient is φ = 8941363200.

The previous prime is 18656371969. The next prime is 18656372029. The reversal of 18656372012 is 21027365681.

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, 5885564 + ... + 5888732.

It is an arithmetic number, because the mean of its divisors is an integer number (708837360).

Almost surely, 2^18656372012 is an apocalyptic number.

It is an amenable number.

18656372012 is a deficient number, since it is larger than the sum of its proper divisors (15367821268).

18656372012 is a wasteful number, since it uses less digits than its factorization.

18656372012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 18656372012 in words is "eighteen billion, six hundred fifty-six million, three hundred seventy-two thousand, twelve".