18398396004 has 12 divisors (see below), whose sum is σ = 42929590704. Its totient is φ = 6132798664.

The previous prime is 18398395997. The next prime is 18398396011. The reversal of 18398396004 is 40069389381.

It is an interprime number because it is at equal distance from previous prime (18398395997) and next prime (18398396011).

It is a tau number, because it is divible by the number of its divisors (12).

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, 766599822 + ... + 766599845.

It is an arithmetic number, because the mean of its divisors is an integer number (3577465892).

Almost surely, 2^18398396004 is an apocalyptic number.

It is an amenable number.

18398396004 is an abundant number, since it is smaller than the sum of its proper divisors (24531194700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18398396004 is a wasteful number, since it uses less digits than its factorization.

18398396004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533199674 (or 1533199672 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 18398396004 in words is "eighteen billion, three hundred ninety-eight million, three hundred ninety-six thousand, four".