18549085 has 4 divisors (see below), whose sum is σ = 22258908. Its totient is φ = 14839264.

The previous prime is 18549071. The next prime is 18549101. The reversal of 18549085 is 58094581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58094581 = 41 ⋅1416941.

It can be written as a sum of positive squares in 2 ways, for example, as 12687844 + 5861241 = 3562^2 + 2421^2 .

It is a cyclic number.

It is not a de Polignac number, because 18549085 - 2⁵ = 18549053 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 1854904 + ... + 1854913.

It is an arithmetic number, because the mean of its divisors is an integer number (5564727).

Almost surely, 2^18549085 is an apocalyptic number.

It is an amenable number.

18549085 is a deficient number, since it is larger than the sum of its proper divisors (3709823).

18549085 is an equidigital number, since it uses as much as digits as its factorization.

18549085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709822.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 18549085 is about 4306.8648690202. The cubic root of 18549085 is about 264.7123257739.

The spelling of 18549085 in words is "eighteen million, five hundred forty-nine thousand, eighty-five".