18200244 has 12 divisors (see below), whose sum is σ = 42467264. Its totient is φ = 6066744.

The previous prime is 18200219. The next prime is 18200279. The reversal of 18200244 is 44200281.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18200244.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 758332 + ... + 758355.

Almost surely, 2^18200244 is an apocalyptic number.

It is an amenable number.

18200244 is an abundant number, since it is smaller than the sum of its proper divisors (24267020).

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

18200244 is a wasteful number, since it uses less digits than its factorization.

18200244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516694 (or 1516692 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 18200244 is about 4266.1743986855. The cubic root of 18200244 is about 263.0423869188.

The spelling of 18200244 in words is "eighteen million, two hundred thousand, two hundred forty-four".