18500308 has 12 divisors (see below), whose sum is σ = 32859232. Its totient is φ = 9111960.

The previous prime is 18500291. The next prime is 18500309. The reversal of 18500308 is 80300581.

It is a super-2 number, since 2×18500308² = 684522792189728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500309) 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, 34248 + ... + 34783.

Almost surely, 2^18500308 is an apocalyptic number.

It is an amenable number.

18500308 is a deficient number, since it is larger than the sum of its proper divisors (14358924).

18500308 is a wasteful number, since it uses less digits than its factorization.

18500308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69102 (or 69100 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18500308 is about 4301.1984376450. The cubic root of 18500308 is about 264.4800913638.

Adding to 18500308 its reverse (80300581), we get a palindrome (98800889).

The spelling of 18500308 in words is "eighteen million, five hundred thousand, three hundred eight".