18977152128 has 96 divisors (see below), whose sum is σ = 55407342480. Its totient is φ = 5750638080.

The previous prime is 18977152097. The next prime is 18977152189. The reversal of 18977152128 is 82125177981.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157750 + ... + 250677.

Almost surely, 2^18977152128 is an apocalyptic number.

It is an amenable number.

18977152128 is an abundant number, since it is smaller than the sum of its proper divisors (36430190352).

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

18977152128 is a wasteful number, since it uses less digits than its factorization.

18977152128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408466 (or 408443 counting only the distinct ones).

The product of its digits is 564480, while the sum is 51.

The spelling of 18977152128 in words is "eighteen billion, nine hundred seventy-seven million, one hundred fifty-two thousand, one hundred twenty-eight".