18500868 has 36 divisors (see below), whose sum is σ = 47135088. Its totient is φ = 6118320.

The previous prime is 18500863. The next prime is 18500887. The reversal of 18500868 is 86800581.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18500863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2755 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (1309308).

Almost surely, 2^18500868 is an apocalyptic number.

18500868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18500868 is an abundant number, since it is smaller than the sum of its proper divisors (28634220).

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

18500868 is a wasteful number, since it uses less digits than its factorization.

18500868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064 (or 4059 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 18500868 is about 4301.2635352882. The cubic root of 18500868 is about 264.4827599204.

The spelling of 18500868 in words is "eighteen million, five hundred thousand, eight hundred sixty-eight".