18027873 has 8 divisors (see below), whose sum is σ = 26708000. Its totient is φ = 12018564.

The previous prime is 18027869. The next prime is 18027881. The reversal of 18027873 is 37872081.

It is not a de Polignac number, because 18027873 - 2² = 18027869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18027853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333823 + ... + 333876.

It is an arithmetic number, because the mean of its divisors is an integer number (3338500).

Almost surely, 2^18027873 is an apocalyptic number.

It is an amenable number.

18027873 is a deficient number, since it is larger than the sum of its proper divisors (8680127).

18027873 is an equidigital number, since it uses as much as digits as its factorization.

18027873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667708 (or 667702 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 18027873 is about 4245.9242810017. The cubic root of 18027873 is about 262.2093435920.

The spelling of 18027873 in words is "eighteen million, twenty-seven thousand, eight hundred seventy-three".