18188950 has 24 divisors (see below), whose sum is σ = 36435168. Its totient is φ = 6715680.

The previous prime is 18188927. The next prime is 18188977. The reversal of 18188950 is 5988181.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13342 + ... + 14641.

It is an arithmetic number, because the mean of its divisors is an integer number (1518132).

Almost surely, 2^18188950 is an apocalyptic number.

18188950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18188950 is an abundant number, since it is smaller than the sum of its proper divisors (18246218).

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

18188950 is a wasteful number, since it uses less digits than its factorization.

18188950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28008 (or 28003 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 18188950 is about 4264.8505249305. The cubic root of 18188950 is about 262.9879661204.

The spelling of 18188950 in words is "eighteen million, one hundred eighty-eight thousand, nine hundred fifty".