18093372 has 72 divisors (see below), whose sum is σ = 49201488. Its totient is φ = 5153280.

The previous prime is 18093347. The next prime is 18093373. The reversal of 18093372 is 27339081.

It is a super-2 number, since 2×18093372² = 654740220660768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18093373) 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, 24318 + ... + 25050.

It is an arithmetic number, because the mean of its divisors is an integer number (683354).

Almost surely, 2^18093372 is an apocalyptic number.

18093372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18093372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24600744).

18093372 is an abundant number, since it is smaller than the sum of its proper divisors (31108116).

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

18093372 is a wasteful number, since it uses less digits than its factorization.

18093372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 18093372 is about 4253.6304493926. The cubic root of 18093372 is about 262.5265134217.

The spelling of 18093372 in words is "eighteen million, ninety-three thousand, three hundred seventy-two".