18390336 has 28 divisors (see below), whose sum is σ = 48658272. Its totient is φ = 6130048.

The previous prime is 18390299. The next prime is 18390343. The reversal of 18390336 is 63309381.

It is a junction number, because it is equal to n+sod(n) for n = 18390297 and 18390306.

It is a congruent number.

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, 47700 + ... + 48083.

Almost surely, 2^18390336 is an apocalyptic number.

18390336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18390336 is an abundant number, since it is smaller than the sum of its proper divisors (30267936).

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

18390336 is an equidigital number, since it uses as much as digits as its factorization.

18390336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95798 (or 95788 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 18390336 is about 4288.3955041484. The cubic root of 18390336 is about 263.9549969203.

The spelling of 18390336 in words is "eighteen million, three hundred ninety thousand, three hundred thirty-six".