18366372 has 48 divisors (see below), whose sum is σ = 47940480. Its totient is φ = 6080544.

The previous prime is 18366371. The next prime is 18366377. The reversal of 18366372 is 27366381.

It is a happy number.

18366372 is a `hidden beast` number, since 18 + 3 + 6 + 637 + 2 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18193 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (998760).

Almost surely, 2^18366372 is an apocalyptic number.

18366372 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 18366372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23970240).

18366372 is an abundant number, since it is smaller than the sum of its proper divisors (29574108).

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

18366372 is a wasteful number, since it uses less digits than its factorization.

18366372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1161 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 18366372 is about 4285.6005413477. The cubic root of 18366372 is about 263.8402959702.

Subtracting 18366372 from its reverse (27366381), we obtain a palindrome (9000009).

The spelling of 18366372 in words is "eighteen million, three hundred sixty-six thousand, three hundred seventy-two".