18325516 has 24 divisors (see below), whose sum is σ = 35315280. Its totient is φ = 8251200.

The previous prime is 18325513. The next prime is 18325529. The reversal of 18325516 is 61552381.

It is not an unprimeable number, because it can be changed into a prime (18325513) 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, 2886 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (1471470).

Almost surely, 2^18325516 is an apocalyptic number.

It is an amenable number.

18325516 is a deficient number, since it is larger than the sum of its proper divisors (16989764).

18325516 is a wasteful number, since it uses less digits than its factorization.

18325516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945 (or 3943 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 18325516 is about 4280.8312276940. The cubic root of 18325516 is about 263.6445131196.

Adding to 18325516 its reverse (61552381), we get a palindrome (79877897).

The spelling of 18325516 in words is "eighteen million, three hundred twenty-five thousand, five hundred sixteen".