18089368 has 64 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 7516800.

The previous prime is 18089333. The next prime is 18089371. The reversal of 18089368 is 86398081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51658 + ... + 52006.

It is an arithmetic number, because the mean of its divisors is an integer number (630000).

Almost surely, 2^18089368 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 18089368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20160000).

18089368 is an abundant number, since it is smaller than the sum of its proper divisors (22230632).

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

18089368 is a wasteful number, since it uses less digits than its factorization.

18089368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18089368 is about 4253.1597665736. The cubic root of 18089368 is about 262.5071465930.

The spelling of 18089368 in words is "eighteen million, eighty-nine thousand, three hundred sixty-eight".