18442507108 has 12 divisors (see below), whose sum is σ = 32302387180. Its totient is φ = 9213253632.

The previous prime is 18442507099. The next prime is 18442507129. The reversal of 18442507108 is 80170524481.

It can be written as a sum of positive squares in 2 ways, for example, as 9092003904 + 9350503204 = 95352^2 + 96698^2 .

It is a super-3 number, since 3×18442507108³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994793 + ... + 2004016.

Almost surely, 2^18442507108 is an apocalyptic number.

It is an amenable number.

18442507108 is a deficient number, since it is larger than the sum of its proper divisors (13859880072).

18442507108 is a wasteful number, since it uses less digits than its factorization.

18442507108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999966 (or 3999964 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 18442507108 in words is "eighteen billion, four hundred forty-two million, five hundred seven thousand, one hundred eight".