18613085 has 4 divisors (see below), whose sum is σ = 22335708. Its totient is φ = 14890464.

The previous prime is 18613061. The next prime is 18613087. The reversal of 18613085 is 58031681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58031681 = 19 ⋅3054299.

It can be written as a sum of positive squares in 2 ways, for example, as 9114361 + 9498724 = 3019^2 + 3082^2 .

It is a cyclic number.

It is not a de Polignac number, because 18613085 - 2⁸ = 18612829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18613087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861304 + ... + 1861313.

It is an arithmetic number, because the mean of its divisors is an integer number (5583927).

Almost surely, 2^18613085 is an apocalyptic number.

It is an amenable number.

18613085 is a deficient number, since it is larger than the sum of its proper divisors (3722623).

18613085 is an equidigital number, since it uses as much as digits as its factorization.

18613085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722622.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18613085 is about 4314.2884697248. The cubic root of 18613085 is about 265.0164223832.

The spelling of 18613085 in words is "eighteen million, six hundred thirteen thousand, eighty-five".