18249936 has 20 divisors (see below), whose sum is σ = 47145792. Its totient is φ = 6083296.

The previous prime is 18249923. The next prime is 18249941. The reversal of 18249936 is 63994281.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 190056 + ... + 190151.

Almost surely, 2^18249936 is an apocalyptic number.

18249936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18249936 is an abundant number, since it is smaller than the sum of its proper divisors (28895856).

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

18249936 is a wasteful number, since it uses less digits than its factorization.

18249936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380218 (or 380212 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 18249936 is about 4271.9943820188. The cubic root of 18249936 is about 263.2815636449.

The spelling of 18249936 in words is "eighteen million, two hundred forty-nine thousand, nine hundred thirty-six".