18251331804 has 60 divisors (see below), whose sum is σ = 47998432944. Its totient is φ = 6047329536.

The previous prime is 18251331793. The next prime is 18251331863. The reversal of 18251331804 is 40813315281.

It is a super-2 number, since 2×18251331804² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 114549 + ... + 222764.

Almost surely, 2^18251331804 is an apocalyptic number.

It is an amenable number.

18251331804 is an abundant number, since it is smaller than the sum of its proper divisors (29747101140).

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

18251331804 is a wasteful number, since it uses less digits than its factorization.

18251331804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337496 (or 337485 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 18251331804 in words is "eighteen billion, two hundred fifty-one million, three hundred thirty-one thousand, eight hundred four".