18085047 has 4 divisors (see below), whose sum is σ = 24113400. Its totient is φ = 12056696.

The previous prime is 18085019. The next prime is 18085051. The reversal of 18085047 is 74058081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18085047 - 2⁷ = 18084919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18084999 and 18085017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014172 + ... + 3014177.

It is an arithmetic number, because the mean of its divisors is an integer number (6028350).

Almost surely, 2^18085047 is an apocalyptic number.

18085047 is a deficient number, since it is larger than the sum of its proper divisors (6028353).

18085047 is an equidigital number, since it uses as much as digits as its factorization.

18085047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028352.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18085047 is about 4252.6517609604. The cubic root of 18085047 is about 262.4862432700.

The spelling of 18085047 in words is "eighteen million, eighty-five thousand, forty-seven".