18399839804 has 12 divisors (see below), whose sum is σ = 32209640904. Its totient is φ = 9197085264.

The previous prime is 18399839753. The next prime is 18399839813. The reversal of 18399839804 is 40893899381.

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, 694022 + ... + 720045.

It is an arithmetic number, because the mean of its divisors is an integer number (2684136742).

Almost surely, 2^18399839804 is an apocalyptic number.

It is an amenable number.

18399839804 is a deficient number, since it is larger than the sum of its proper divisors (13809801100).

18399839804 is a wasteful number, since it uses less digits than its factorization.

18399839804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417324 (or 1417322 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 18399839804 in words is "eighteen billion, three hundred ninety-nine million, eight hundred thirty-nine thousand, eight hundred four".