18442432 has 28 divisors (see below), whose sum is σ = 36901120. Its totient is φ = 9144576.

The previous prime is 18442421. The next prime is 18442441. The reversal of 18442432 is 23424481.

It is a happy number.

18442432 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18442432.

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, 6994 + ... + 9262.

Almost surely, 2^18442432 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 18442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18450560).

18442432 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18442432 is a wasteful number, since it uses less digits than its factorization.

18442432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408 (or 2398 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 18442432 is about 4294.4652752118. The cubic root of 18442432 is about 264.2040051556.

The spelling of 18442432 in words is "eighteen million, four hundred forty-two thousand, four hundred thirty-two".