18042432 has 28 divisors (see below), whose sum is σ = 47737776. Its totient is φ = 6014080.

The previous prime is 18042361. The next prime is 18042463. The reversal of 18042432 is 23424081.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 46794 + ... + 47177.

Almost surely, 2^18042432 is an apocalyptic number.

18042432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18042432 is an abundant number, since it is smaller than the sum of its proper divisors (29695344).

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

18042432 is an equidigital number, since it uses as much as digits as its factorization.

18042432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93986 (or 93976 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 18042432 is about 4247.6384026892. The cubic root of 18042432 is about 262.2799098505.

The spelling of 18042432 in words is "eighteen million, forty-two thousand, four hundred thirty-two".