17995859911 has 2 divisors, whose sum is σ = 17995859912. Its totient is φ = 17995859910.

The previous prime is 17995859909. The next prime is 17995859963. The reversal of 17995859911 is 11995859971.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17995859911 - 2¹ = 17995859909 is a prime.

Together with 17995859909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17995859411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8997929955 + 8997929956.

It is an arithmetic number, because the mean of its divisors is an integer number (8997929956).

Almost surely, 2^17995859911 is an apocalyptic number.

17995859911 is a deficient number, since it is larger than the sum of its proper divisors (1).

17995859911 is an equidigital number, since it uses as much as digits as its factorization.

17995859911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9185400, while the sum is 64.

The spelling of 17995859911 in words is "seventeen billion, nine hundred ninety-five million, eight hundred fifty-nine thousand, nine hundred eleven".