18316866 has 16 divisors (see below), whose sum is σ = 36676224. Its totient is φ = 6098544.

The previous prime is 18316849. The next prime is 18316867. The reversal of 18316866 is 66861381.

It is not an unprimeable number, because it can be changed into a prime (18316867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7896 + ... + 9948.

It is an arithmetic number, because the mean of its divisors is an integer number (2292264).

Almost surely, 2^18316866 is an apocalyptic number.

18316866 is an abundant number, since it is smaller than the sum of its proper divisors (18359358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18316866 is a wasteful number, since it uses less digits than its factorization.

18316866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545.

The product of its digits is 41472, while the sum is 39.

The square root of 18316866 is about 4279.8207906407. The cubic root of 18316866 is about 263.6030248117.

The spelling of 18316866 in words is "eighteen million, three hundred sixteen thousand, eight hundred sixty-six".