18330866 has 16 divisors (see below), whose sum is σ = 28253400. Its totient is φ = 8916480.

The previous prime is 18330859. The next prime is 18330881. The reversal of 18330866 is 66803381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8850625 + 9480241 = 2975^2 + 3079^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11060 + ... + 12608.

Almost surely, 2^18330866 is an apocalyptic number.

18330866 is a deficient number, since it is larger than the sum of its proper divisors (9922534).

18330866 is a wasteful number, since it uses less digits than its factorization.

18330866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18330866 is about 4281.4560607345. The cubic root of 18330866 is about 263.6701669840.

The spelling of 18330866 in words is "eighteen million, three hundred thirty thousand, eight hundred sixty-six".