18449430968 has 16 divisors (see below), whose sum is σ = 35159777160. Its totient is φ = 9073490400.

The previous prime is 18449430949. The next prime is 18449430973. The reversal of 18449430968 is 86903494481.

It is a congruent number.

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, 18902618 + ... + 18903593.

Almost surely, 2^18449430968 is an apocalyptic number.

It is an amenable number.

18449430968 is a deficient number, since it is larger than the sum of its proper divisors (16710346192).

18449430968 is a wasteful number, since it uses less digits than its factorization.

18449430968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37806278 (or 37806274 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 18449430968 in words is "eighteen billion, four hundred forty-nine million, four hundred thirty thousand, nine hundred sixty-eight".