18665382 has 16 divisors (see below), whose sum is σ = 37416960. Its totient is φ = 6207432.

The previous prime is 18665377. The next prime is 18665389. The reversal of 18665382 is 28356681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18665382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18665389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 6137.

It is an arithmetic number, because the mean of its divisors is an integer number (2338560).

Almost surely, 2^18665382 is an apocalyptic number.

18665382 is an abundant number, since it is smaller than the sum of its proper divisors (18751578).

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

18665382 is a wasteful number, since it uses less digits than its factorization.

18665382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7187.

The product of its digits is 69120, while the sum is 39.

The square root of 18665382 is about 4320.3451251029. The cubic root of 18665382 is about 265.2643949557.

The spelling of 18665382 in words is "eighteen million, six hundred sixty-five thousand, three hundred eighty-two".