18422432 has 72 divisors (see below), whose sum is σ = 43666560. Its totient is φ = 7620480.

The previous prime is 18422389. The next prime is 18422479. The reversal of 18422432 is 23422481.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48419 + ... + 48797.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^18422432 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 18422432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21833280).

18422432 is an abundant number, since it is smaller than the sum of its proper divisors (25244128).

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

18422432 is a wasteful number, since it uses less digits than its factorization.

18422432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 419 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 18422432 is about 4292.1360649448. The cubic root of 18422432 is about 264.1084647668.

It can be divided in two parts, 1842 and 2432, that multiplied together give a palindrome (4479744).

The spelling of 18422432 in words is "eighteen million, four hundred twenty-two thousand, four hundred thirty-two".