18965290128 has 20 divisors (see below), whose sum is σ = 48993666288. Its totient is φ = 6321763360.

The previous prime is 18965290121. The next prime is 18965290129. The reversal of 18965290128 is 82109256981.

It is not an unprimeable number, because it can be changed into a prime (18965290121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197555058 + ... + 197555153.

Almost surely, 2^18965290128 is an apocalyptic number.

It is an amenable number.

18965290128 is an abundant number, since it is smaller than the sum of its proper divisors (30028376160).

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

18965290128 is a wasteful number, since it uses less digits than its factorization.

18965290128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395110222 (or 395110216 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 18965290128 in words is "eighteen billion, nine hundred sixty-five million, two hundred ninety thousand, one hundred twenty-eight".