18085203 has 6 divisors (see below), whose sum is σ = 26123084. Its totient is φ = 12056796.

The previous prime is 18085189. The next prime is 18085213. The reversal of 18085203 is 30258081.

It is a happy number.

It is not a de Polignac number, because 18085203 - 2¹⁴ = 18068819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18085213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1004725 + ... + 1004742.

Almost surely, 2^18085203 is an apocalyptic number.

18085203 is a deficient number, since it is larger than the sum of its proper divisors (8037881).

18085203 is a wasteful number, since it uses less digits than its factorization.

18085203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009473 (or 2009470 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18085203 is about 4252.6701024180. The cubic root of 18085203 is about 262.4869979955.

The spelling of 18085203 in words is "eighteen million, eighty-five thousand, two hundred three".