18318508 has 24 divisors (see below), whose sum is σ = 36342320. Its totient is φ = 8009280.

The previous prime is 18318499. The next prime is 18318523. The reversal of 18318508 is 80581381.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8283 + ... + 10258.

Almost surely, 2^18318508 is an apocalyptic number.

It is an amenable number.

18318508 is a deficient number, since it is larger than the sum of its proper divisors (18023812).

18318508 is a wasteful number, since it uses less digits than its factorization.

18318508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18577 (or 18575 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 18318508 is about 4280.0126168038. The cubic root of 18318508 is about 263.6109014000.

Adding to 18318508 its reverse (80581381), we get a palindrome (98899889).

The spelling of 18318508 in words is "eighteen million, three hundred eighteen thousand, five hundred eight".