18856472068 has 24 divisors (see below), whose sum is σ = 37719229184. Its totient is φ = 8079998400.

The previous prime is 18856471981. The next prime is 18856472087. The reversal of 18856472068 is 86027465881.

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, 125173 + ... + 231043.

Almost surely, 2^18856472068 is an apocalyptic number.

It is an amenable number.

18856472068 is an abundant number, since it is smaller than the sum of its proper divisors (18862757116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18856472068 is a wasteful number, since it uses less digits than its factorization.

18856472068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112243 (or 112241 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 18856472068 in words is "eighteen billion, eight hundred fifty-six million, four hundred seventy-two thousand, sixty-eight".