18898512904 has 8 divisors (see below), whose sum is σ = 35434711710. Its totient is φ = 9449256448.

The previous prime is 18898512883. The next prime is 18898512917. The reversal of 18898512904 is 40921589881.

It can be written as a sum of positive squares in only one way, i.e., 15178732804 + 3719780100 = 123202^2 + 60990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1181157049 + ... + 1181157064.

Almost surely, 2^18898512904 is an apocalyptic number.

It is an amenable number.

18898512904 is a deficient number, since it is larger than the sum of its proper divisors (16536198806).

18898512904 is a wasteful number, since it uses less digits than its factorization.

18898512904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362314119 (or 2362314115 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 55.

The spelling of 18898512904 in words is "eighteen billion, eight hundred ninety-eight million, five hundred twelve thousand, nine hundred four".