18868099 has 4 divisors (see below), whose sum is σ = 19306936. Its totient is φ = 18429264.

The previous prime is 18868097. The next prime is 18868111. The reversal of 18868099 is 99086881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18868099 - 2¹ = 18868097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18868097) 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, 219354 + ... + 219439.

It is an arithmetic number, because the mean of its divisors is an integer number (4826734).

Almost surely, 2^18868099 is an apocalyptic number.

18868099 is a deficient number, since it is larger than the sum of its proper divisors (438837).

18868099 is an equidigital number, since it uses as much as digits as its factorization.

18868099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438836.

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

The square root of 18868099 is about 4343.7425107849. The cubic root of 18868099 is about 266.2212482637.

The spelling of 18868099 in words is "eighteen million, eight hundred sixty-eight thousand, ninety-nine".