18297509804 has 24 divisors (see below), whose sum is σ = 37584076320. Its totient is φ = 7629849216.

The previous prime is 18297509773. The next prime is 18297509863. The reversal of 18297509804 is 40890579281.

It is a super-2 number, since 2×18297509804² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8829809 + ... + 8831880.

It is an arithmetic number, because the mean of its divisors is an integer number (1566003180).

Almost surely, 2^18297509804 is an apocalyptic number.

18297509804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18297509804 is an abundant number, since it is smaller than the sum of its proper divisors (19286566516).

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

18297509804 is a wasteful number, since it uses less digits than its factorization.

18297509804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17661737 (or 17661735 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 18297509804 in words is "eighteen billion, two hundred ninety-seven million, five hundred nine thousand, eight hundred four".