18325616 has 20 divisors (see below), whose sum is σ = 35600400. Its totient is φ = 9138432.

The previous prime is 18325613. The next prime is 18325627. The reversal of 18325616 is 61652381.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18325613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5720 + ... + 8328.

It is an arithmetic number, because the mean of its divisors is an integer number (1780020).

Almost surely, 2^18325616 is an apocalyptic number.

18325616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18325616 is a deficient number, since it is larger than the sum of its proper divisors (17274784).

18325616 is a wasteful number, since it uses less digits than its factorization.

18325616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3050 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 18325616 is about 4280.8429076527. The cubic root of 18325616 is about 263.6449926769.

Adding to 18325616 its reverse (61652381), we get a palindrome (79977997).

The spelling of 18325616 in words is "eighteen million, three hundred twenty-five thousand, six hundred sixteen".