18185045 has 8 divisors (see below), whose sum is σ = 21898296. Its totient is φ = 14497216.

The previous prime is 18185029. The next prime is 18185077. The reversal of 18185045 is 54058181.

It can be written as a sum of positive squares in 4 ways, for example, as 4092529 + 14092516 = 2023^2 + 3754^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18185045 - 2⁴ = 18185029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742 + ... + 7671.

It is an arithmetic number, because the mean of its divisors is an integer number (2737287).

Almost surely, 2^18185045 is an apocalyptic number.

It is an amenable number.

18185045 is a deficient number, since it is larger than the sum of its proper divisors (3713251).

18185045 is a wasteful number, since it uses less digits than its factorization.

18185045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12711.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 18185045 is about 4264.3926882969. The cubic root of 18185045 is about 262.9691444089.

The spelling of 18185045 in words is "eighteen million, one hundred eighty-five thousand, forty-five".