18400406852 has 48 divisors (see below), whose sum is σ = 33712344960. Its totient is φ = 8776276992.

The previous prime is 18400406839. The next prime is 18400406879. The reversal of 18400406852 is 25860400481.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9259403 + ... + 9261389.

It is an arithmetic number, because the mean of its divisors is an integer number (702340520).

Almost surely, 2^18400406852 is an apocalyptic number.

It is an amenable number.

18400406852 is a deficient number, since it is larger than the sum of its proper divisors (15311938108).

18400406852 is a wasteful number, since it uses less digits than its factorization.

18400406852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 18400406852 in words is "eighteen billion, four hundred million, four hundred six thousand, eight hundred fifty-two".