18521875 has 12 divisors (see below), whose sum is σ = 23154768. Its totient is φ = 14815000.

The previous prime is 18521861. The next prime is 18521897. The reversal of 18521875 is 57812581.

It is not a de Polignac number, because 18521875 - 2⁷ = 18521747 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 11 ways as a sum of consecutive naturals, for example, 162 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (1929564).

Almost surely, 2^18521875 is an apocalyptic number.

18521875 is a deficient number, since it is larger than the sum of its proper divisors (4632893).

18521875 is an frugal number, since it uses more digits than its factorization.

18521875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952 (or 5932 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 18521875 is about 4303.7047993560. The cubic root of 18521875 is about 264.5828252758.

The spelling of 18521875 in words is "eighteen million, five hundred twenty-one thousand, eight hundred seventy-five".