18085987219 has 2 divisors, whose sum is σ = 18085987220. Its totient is φ = 18085987218.

The previous prime is 18085987207. The next prime is 18085987223. The reversal of 18085987219 is 91278958081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18085987219 - 2⁷ = 18085987091 is a prime.

It is a super-3 number, since 3×18085987219³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (18085987229) 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 as a sum of consecutive naturals, namely, 9042993609 + 9042993610.

It is an arithmetic number, because the mean of its divisors is an integer number (9042993610).

Almost surely, 2^18085987219 is an apocalyptic number.

18085987219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18085987219 is an equidigital number, since it uses as much as digits as its factorization.

18085987219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 58.

The spelling of 18085987219 in words is "eighteen billion, eighty-five million, nine hundred eighty-seven thousand, two hundred nineteen".