18006873 has 4 divisors (see below), whose sum is σ = 24009168. Its totient is φ = 12004580.

The previous prime is 18006839. The next prime is 18006881. The reversal of 18006873 is 37860081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18006873 - 2⁸ = 18006617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18006073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001143 + ... + 3001148.

It is an arithmetic number, because the mean of its divisors is an integer number (6002292).

Almost surely, 2^18006873 is an apocalyptic number.

It is an amenable number.

18006873 is a deficient number, since it is larger than the sum of its proper divisors (6002295).

18006873 is an equidigital number, since it uses as much as digits as its factorization.

18006873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002294.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18006873 is about 4243.4506006315. The cubic root of 18006873 is about 262.1074913904.

The spelling of 18006873 in words is "eighteen million, six thousand, eight hundred seventy-three".