18386368 has 168 divisors, whose sum is σ = 51078384. Its totient is φ = 6451200.

The previous prime is 18386363. The next prime is 18386369. The reversal of 18386368 is 86368381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18386363) 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, 448428 + ... + 448468.

It is an arithmetic number, because the mean of its divisors is an integer number (304038).

Almost surely, 2^18386368 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 18386368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25539192).

18386368 is an abundant number, since it is smaller than the sum of its proper divisors (32692016).

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

18386368 is a wasteful number, since it uses less digits than its factorization.

18386368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 74 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 18386368 is about 4287.9328352949. The cubic root of 18386368 is about 263.9360114277.

The spelling of 18386368 in words is "eighteen million, three hundred eighty-six thousand, three hundred sixty-eight".