18368856 has 96 divisors (see below), whose sum is σ = 56347200. Its totient is φ = 5559840.

The previous prime is 18368851. The next prime is 18368863. The reversal of 18368856 is 65886381.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20955 + ... + 21813.

It is an arithmetic number, because the mean of its divisors is an integer number (586950).

Almost surely, 2^18368856 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 18368856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28173600).

18368856 is an abundant number, since it is smaller than the sum of its proper divisors (37978344).

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

18368856 is a wasteful number, since it uses less digits than its factorization.

18368856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 875 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18368856 is about 4285.8903392411. The cubic root of 18368856 is about 263.8521899859.

The spelling of 18368856 in words is "eighteen million, three hundred sixty-eight thousand, eight hundred fifty-six".