18998075 has 6 divisors (see below), whose sum is σ = 23557644. Its totient is φ = 15198440.

The previous prime is 18998053. The next prime is 18998093. The reversal of 18998075 is 57089981.

It is a happy number.

It is not a de Polignac number, because 18998075 - 2⁸ = 18997819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 379937 + ... + 379986.

It is an arithmetic number, because the mean of its divisors is an integer number (3926274).

Almost surely, 2^18998075 is an apocalyptic number.

18998075 is a deficient number, since it is larger than the sum of its proper divisors (4559569).

18998075 is an equidigital number, since it uses as much as digits as its factorization.

18998075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759933 (or 759928 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 18998075 is about 4358.6781253036. The cubic root of 18998075 is about 266.8311528605.

The spelling of 18998075 in words is "eighteen million, nine hundred ninety-eight thousand, seventy-five".