18814117928 has 8 divisors (see below), whose sum is σ = 35276471130. Its totient is φ = 9407058960.

The previous prime is 18814117919. The next prime is 18814117937. The reversal of 18814117928 is 82971141881.

It is an interprime number because it is at equal distance from previous prime (18814117919) and next prime (18814117937).

It can be written as a sum of positive squares in only one way, i.e., 18812316964 + 1800964 = 137158^2 + 1342^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175882363 + ... + 1175882378.

Almost surely, 2^18814117928 is an apocalyptic number.

It is an amenable number.

18814117928 is a deficient number, since it is larger than the sum of its proper divisors (16462353202).

18814117928 is a wasteful number, since it uses less digits than its factorization.

18814117928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351764747 (or 2351764743 counting only the distinct ones).

The product of its digits is 258048, while the sum is 50.

The spelling of 18814117928 in words is "eighteen billion, eight hundred fourteen million, one hundred seventeen thousand, nine hundred twenty-eight".