18085963 has 4 divisors (see below), whose sum is σ = 20669680. Its totient is φ = 15502248.

The previous prime is 18085931. The next prime is 18085973. The reversal of 18085963 is 36958081.

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 18085963 - 2⁵ = 18085931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18085973) 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 3 ways as a sum of consecutive naturals, for example, 1291848 + ... + 1291861.

It is an arithmetic number, because the mean of its divisors is an integer number (5167420).

Almost surely, 2^18085963 is an apocalyptic number.

18085963 is a deficient number, since it is larger than the sum of its proper divisors (2583717).

18085963 is an equidigital number, since it uses as much as digits as its factorization.

18085963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583716.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18085963 is about 4252.7594571055. The cubic root of 18085963 is about 262.4906748010.

The spelling of 18085963 in words is "eighteen million, eighty-five thousand, nine hundred sixty-three".