18864875 has 8 divisors (see below), whose sum is σ = 23543520. Its totient is φ = 15091800.

The previous prime is 18864871. The next prime is 18864887. The reversal of 18864875 is 57846881.

It is a happy number.

It is not a de Polignac number, because 18864875 - 2² = 18864871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18864871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75335 + ... + 75584.

It is an arithmetic number, because the mean of its divisors is an integer number (2942940).

Almost surely, 2^18864875 is an apocalyptic number.

18864875 is a deficient number, since it is larger than the sum of its proper divisors (4678645).

18864875 is an equidigital number, since it uses as much as digits as its factorization.

18864875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150934 (or 150924 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 18864875 is about 4343.3713863772. The cubic root of 18864875 is about 266.2060842878.

The spelling of 18864875 in words is "eighteen million, eight hundred sixty-four thousand, eight hundred seventy-five".