18804999 has 4 divisors (see below), whose sum is σ = 25073336. Its totient is φ = 12536664.

The previous prime is 18804997. The next prime is 18805013. The reversal of 18804999 is 99940881.

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

It is not a de Polignac number, because 18804999 - 2¹ = 18804997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18804997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134164 + ... + 3134169.

It is an arithmetic number, because the mean of its divisors is an integer number (6268334).

Almost surely, 2^18804999 is an apocalyptic number.

18804999 is a deficient number, since it is larger than the sum of its proper divisors (6268337).

18804999 is an equidigital number, since it uses as much as digits as its factorization.

18804999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6268336.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 18804999 is about 4336.4731061082. The cubic root of 18804999 is about 265.9241449901.

The spelling of 18804999 in words is "eighteen million, eight hundred four thousand, nine hundred ninety-nine".