18518708 has 12 divisors (see below), whose sum is σ = 34900740. Its totient is φ = 8547072.

The previous prime is 18518707. The next prime is 18518719. The reversal of 18518708 is 80781581.

It can be written as a sum of positive squares in 2 ways, for example, as 4169764 + 14348944 = 2042^2 + 3788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518707) 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, 178013 + ... + 178116.

It is an arithmetic number, because the mean of its divisors is an integer number (2908395).

Almost surely, 2^18518708 is an apocalyptic number.

It is an amenable number.

18518708 is a deficient number, since it is larger than the sum of its proper divisors (16382032).

18518708 is a wasteful number, since it uses less digits than its factorization.

18518708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356146 (or 356144 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 38.

The square root of 18518708 is about 4303.3368448217. The cubic root of 18518708 is about 264.5677443409.

The spelling of 18518708 in words is "eighteen million, five hundred eighteen thousand, seven hundred eight".