17995538089 has 2 divisors, whose sum is σ = 17995538090. Its totient is φ = 17995538088.

The previous prime is 17995538063. The next prime is 17995538129. The reversal of 17995538089 is 98083559971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16617272464 + 1378265625 = 128908^2 + 37125^2 .

It is a cyclic number.

It is not a de Polignac number, because 17995538089 - 2³¹ = 15848054441 is a prime.

It is a super-2 number, since 2×17995538089² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17995538089.

It is not a weakly prime, because it can be changed into another prime (17995538389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8997769044 + 8997769045.

It is an arithmetic number, because the mean of its divisors is an integer number (8997769045).

Almost surely, 2^17995538089 is an apocalyptic number.

It is an amenable number.

17995538089 is a deficient number, since it is larger than the sum of its proper divisors (1).

17995538089 is an equidigital number, since it uses as much as digits as its factorization.

17995538089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24494400, while the sum is 64.

The spelling of 17995538089 in words is "seventeen billion, nine hundred ninety-five million, five hundred thirty-eight thousand, eighty-nine".