18508316 has 12 divisors (see below), whose sum is σ = 32495232. Its totient is φ = 9223968.

The previous prime is 18508313. The next prime is 18508319. The reversal of 18508316 is 61380581.

It is an interprime number because it is at equal distance from previous prime (18508313) and next prime (18508319).

It is a super-2 number, since 2×18508316² = 685115522311712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18508313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6140 + ... + 8643.

It is an arithmetic number, because the mean of its divisors is an integer number (2707936).

Almost surely, 2^18508316 is an apocalyptic number.

It is an amenable number.

18508316 is a deficient number, since it is larger than the sum of its proper divisors (13986916).

18508316 is a wasteful number, since it uses less digits than its factorization.

18508316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100 (or 15098 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18508316 is about 4302.1292402716. The cubic root of 18508316 is about 264.5182466034.

Adding to 18508316 its reverse (61380581), we get a palindrome (79888897).

The spelling of 18508316 in words is "eighteen million, five hundred eight thousand, three hundred sixteen".