18085133 has 4 divisors (see below), whose sum is σ = 19729248. Its totient is φ = 16441020.

The previous prime is 18085117. The next prime is 18085147. The reversal of 18085133 is 33158081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33158081 = 11 ⋅3014371.

It is a cyclic number.

It is not a de Polignac number, because 18085133 - 2⁴ = 18085117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18085096 and 18085105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085103) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 822041 + ... + 822062.

It is an arithmetic number, because the mean of its divisors is an integer number (4932312).

Almost surely, 2^18085133 is an apocalyptic number.

It is an amenable number.

18085133 is a deficient number, since it is larger than the sum of its proper divisors (1644115).

18085133 is a wasteful number, since it uses less digits than its factorization.

18085133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644114.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18085133 is about 4252.6618722866. The cubic root of 18085133 is about 262.4866593371.

The spelling of 18085133 in words is "eighteen million, eighty-five thousand, one hundred thirty-three".