18045785 has 8 divisors (see below), whose sum is σ = 21702336. Its totient is φ = 14405040.

The previous prime is 18045773. The next prime is 18045787. The reversal of 18045785 is 58754081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18045785 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18045787) 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 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 6140.

It is an arithmetic number, because the mean of its divisors is an integer number (2712792).

Almost surely, 2^18045785 is an apocalyptic number.

It is an amenable number.

18045785 is a deficient number, since it is larger than the sum of its proper divisors (3656551).

18045785 is an equidigital number, since it uses as much as digits as its factorization.

18045785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 18045785 is about 4248.0330742592. The cubic root of 18045785 is about 262.2961561834.

The spelling of 18045785 in words is "eighteen million, forty-five thousand, seven hundred eighty-five".