18120316 has 12 divisors (see below), whose sum is σ = 32248440. Its totient is φ = 8906480.

The previous prime is 18120307. The next prime is 18120353. The reversal of 18120316 is 61302181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38155 + ... + 38626.

It is an arithmetic number, because the mean of its divisors is an integer number (2687370).

Almost surely, 2^18120316 is an apocalyptic number.

It is an amenable number.

18120316 is a deficient number, since it is larger than the sum of its proper divisors (14128124).

18120316 is a wasteful number, since it uses less digits than its factorization.

18120316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76844 (or 76842 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 18120316 is about 4256.7964480346. The cubic root of 18120316 is about 262.6567638079.

Adding to 18120316 its reverse (61302181), we get a palindrome (79422497).

The spelling of 18120316 in words is "eighteen million, one hundred twenty thousand, three hundred sixteen".