18222086212585 has 4 divisors (see below), whose sum is σ = 21866503455108. Its totient is φ = 14577668970064.

The previous prime is 18222086212579. The next prime is 18222086212591. The reversal of 18222086212585 is 58521268022281.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (18222086212579) and next prime (18222086212591).

It can be written as a sum of positive squares in 2 ways, for example, as 13840721377344 + 4381364835241 = 3720312^2 + 2093171^2 .

It is a cyclic number.

It is not a de Polignac number, because 18222086212585 - 2³³ = 18213496277993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822208621254 + ... + 1822208621263.

It is an arithmetic number, because the mean of its divisors is an integer number (5466625863777).

Almost surely, 2^{18222086212585} is an apocalyptic number.

It is an amenable number.

18222086212585 is a deficient number, since it is larger than the sum of its proper divisors (3644417242523).

18222086212585 is an equidigital number, since it uses as much as digits as its factorization.

18222086212585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644417242522.

The product of its (nonzero) digits is 2457600, while the sum is 52.

The spelling of 18222086212585 in words is "eighteen trillion, two hundred twenty-two billion, eighty-six million, two hundred twelve thousand, five hundred eighty-five".