18255868 has 12 divisors (see below), whose sum is σ = 32039280. Its totient is φ = 9101792.

The previous prime is 18255863. The next prime is 18255889. The reversal of 18255868 is 86855281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18255863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4921 + ... + 7792.

It is an arithmetic number, because the mean of its divisors is an integer number (2669940).

Almost surely, 2^18255868 is an apocalyptic number.

It is an amenable number.

18255868 is a deficient number, since it is larger than the sum of its proper divisors (13783412).

18255868 is a wasteful number, since it uses less digits than its factorization.

18255868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13076 (or 13074 counting only the distinct ones).

The product of its digits is 153600, while the sum is 43.

The square root of 18255868 is about 4272.6886149122. The cubic root of 18255868 is about 263.3100864308.

The spelling of 18255868 in words is "eighteen million, two hundred fifty-five thousand, eight hundred sixty-eight".