18604031232 has 72 divisors (see below), whose sum is σ = 49625049600. Its totient is φ = 6187417600.

The previous prime is 18604031213. The next prime is 18604031273. The reversal of 18604031232 is 23213040681.

It is a super-2 number, since 2×18604031232² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18604031232.

It is a congruent number.

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, 317857 + ... + 371807.

It is an arithmetic number, because the mean of its divisors is an integer number (689236800).

Almost surely, 2^18604031232 is an apocalyptic number.

18604031232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18604031232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24812524800).

18604031232 is an abundant number, since it is smaller than the sum of its proper divisors (31021018368).

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

18604031232 is an equidigital number, since it uses as much as digits as its factorization.

18604031232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54419 (or 54405 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 18604031232 in words is "eighteen billion, six hundred four million, thirty-one thousand, two hundred thirty-two".