18099868 has 12 divisors (see below), whose sum is σ = 31710952. Its totient is φ = 9039600.

The previous prime is 18099853. The next prime is 18099869. The reversal of 18099868 is 86899081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099869) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2443 + ... + 6493.

Almost surely, 2^18099868 is an apocalyptic number.

It is an amenable number.

18099868 is a deficient number, since it is larger than the sum of its proper divisors (13611084).

18099868 is a wasteful number, since it uses less digits than its factorization.

18099868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172 (or 5170 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 18099868 is about 4254.3939638919. The cubic root of 18099868 is about 262.5579276542.

The spelling of 18099868 in words is "eighteen million, ninety-nine thousand, eight hundred sixty-eight".