17986868971 has 2 divisors, whose sum is σ = 17986868972. Its totient is φ = 17986868970.

The previous prime is 17986868899. The next prime is 17986869001.

17986868971 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 17986868971 - 2¹³ = 17986860779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17986868971.

It is not a weakly prime, because it can be changed into another prime (17986868771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8993434485 + 8993434486.

It is an arithmetic number, because the mean of its divisors is an integer number (8993434486).

Almost surely, 2^17986868971 is an apocalyptic number.

17986868971 is a deficient number, since it is larger than the sum of its proper divisors (1).

17986868971 is an equidigital number, since it uses as much as digits as its factorization.

17986868971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 70.

The spelling of 17986868971 in words is "seventeen billion, nine hundred eighty-six million, eight hundred sixty-eight thousand, nine hundred seventy-one".