18103232 has 56 divisors (see below), whose sum is σ = 43488864. Its totient is φ = 7299072.

The previous prime is 18103201. The next prime is 18103237. The reversal of 18103232 is 23230181.

It is a tau number, because it is divible by the number of its divisors (56).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18103237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6428 + ... + 8804.

Almost surely, 2^18103232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18103232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21744432).

18103232 is an abundant number, since it is smaller than the sum of its proper divisors (25385632).

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

18103232 is a wasteful number, since it uses less digits than its factorization.

18103232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18103232 is about 4254.7893014813. The cubic root of 18103232 is about 262.5741927849.

The spelling of 18103232 in words is "eighteen million, one hundred three thousand, two hundred thirty-two".