18250866 has 32 divisors (see below), whose sum is σ = 40870080. Its totient is φ = 6036768.

The previous prime is 18250823. The next prime is 18250901. The reversal of 18250866 is 66805281.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18250866.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6165 + ... + 8631.

It is an arithmetic number, because the mean of its divisors is an integer number (1277190).

Almost surely, 2^18250866 is an apocalyptic number.

18250866 is an abundant number, since it is smaller than the sum of its proper divisors (22619214).

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

18250866 is a wasteful number, since it uses less digits than its factorization.

18250866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615 (or 2609 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 18250866 is about 4272.1032290899. The cubic root of 18250866 is about 263.2860357646.

The spelling of 18250866 in words is "eighteen million, two hundred fifty thousand, eight hundred sixty-six".