18538850 has 48 divisors (see below), whose sum is σ = 38676096. Its totient is φ = 6552000.

The previous prime is 18538843. The next prime is 18538873. The reversal of 18538850 is 5883581.

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 23 ways as a sum of consecutive naturals, for example, 19895 + ... + 20805.

It is an arithmetic number, because the mean of its divisors is an integer number (805752).

Almost surely, 2^18538850 is an apocalyptic number.

18538850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18538850 is an abundant number, since it is smaller than the sum of its proper divisors (20137246).

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

18538850 is a wasteful number, since it uses less digits than its factorization.

18538850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 18538850 is about 4305.6764857569. The cubic root of 18538850 is about 264.6636292277.

The spelling of 18538850 in words is "eighteen million, five hundred thirty-eight thousand, eight hundred fifty".