18432036 has 144 divisors (see below), whose sum is σ = 57583680. Its totient is φ = 5143824.

The previous prime is 18432017. The next prime is 18432041. The reversal of 18432036 is 63023481.

It is a happy number.

It is a super-2 number, since 2×18432036² = 679479902210592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 428631 + ... + 428673.

Almost surely, 2^18432036 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 18432036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28791840).

18432036 is an abundant number, since it is smaller than the sum of its proper divisors (39151644).

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

18432036 is an equidigital number, since it uses as much as digits as its factorization.

18432036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18432036 is about 4293.2547094250. The cubic root of 18432036 is about 264.1543518868.

The spelling of 18432036 in words is "eighteen million, four hundred thirty-two thousand, thirty-six".