18072432 has 60 divisors (see below), whose sum is σ = 57806320. Its totient is φ = 5163264.

The previous prime is 18072421. The next prime is 18072437. The reversal of 18072432 is 23427081.

It is a super-2 number, since 2×18072432² = 653225596789248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18072396 and 18072405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7957 + ... + 9972.

Almost surely, 2^18072432 is an apocalyptic number.

18072432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18072432 is an abundant number, since it is smaller than the sum of its proper divisors (39733888).

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

18072432 is a wasteful number, since it uses less digits than its factorization.

18072432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17950 (or 17941 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18072432 is about 4251.1683100061. The cubic root of 18072432 is about 262.4251977339.

The spelling of 18072432 in words is "eighteen million, seventy-two thousand, four hundred thirty-two".