18030866 has 32 divisors (see below), whose sum is σ = 32400000. Its totient is φ = 7362432.

The previous prime is 18030853. The next prime is 18030869. The reversal of 18030866 is 66803081.

It is a super-2 number, since 2×18030866² = 650224257419912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18030869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35885 + ... + 36383.

It is an arithmetic number, because the mean of its divisors is an integer number (1012500).

Almost surely, 2^18030866 is an apocalyptic number.

18030866 is a deficient number, since it is larger than the sum of its proper divisors (14369134).

18030866 is a wasteful number, since it uses less digits than its factorization.

18030866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18030866 is about 4246.2767220237. The cubic root of 18030866 is about 262.2238535148.

The spelling of 18030866 in words is "eighteen million, thirty thousand, eight hundred sixty-six".