18032616 has 96 divisors (see below), whose sum is σ = 57383040. Its totient is φ = 5007744.

The previous prime is 18032587. The next prime is 18032647. The reversal of 18032616 is 61623081.

18032616 is a `hidden beast` number, since 18 + 0 + 32 + 616 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18032616.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18165 + ... + 19131.

It is an arithmetic number, because the mean of its divisors is an integer number (597740).

Almost surely, 2^18032616 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 18032616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28691520).

18032616 is an abundant number, since it is smaller than the sum of its proper divisors (39350424).

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

18032616 is a wasteful number, since it uses less digits than its factorization.

18032616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18032616 is about 4246.4827799015. The cubic root of 18032616 is about 262.2323366884.

Adding to 18032616 its reverse (61623081), we get a palindrome (79655697).

The spelling of 18032616 in words is "eighteen million, thirty-two thousand, six hundred sixteen".