19717187683223 has 2 divisors, whose sum is σ = 19717187683224. Its totient is φ = 19717187683222.

The previous prime is 19717187683163. The next prime is 19717187683229. The reversal of 19717187683223 is 32238678171791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19717187683223 - 2⁴⁴ = 2125001638807 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19717187683223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19717187683229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9858593841611 + 9858593841612.

It is an arithmetic number, because the mean of its divisors is an integer number (9858593841612).

Almost surely, 2^{19717187683223} is an apocalyptic number.

19717187683223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19717187683223 is an equidigital number, since it uses as much as digits as its factorization.

19717187683223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 65.

The spelling of 19717187683223 in words is "nineteen trillion, seven hundred seventeen billion, one hundred eighty-seven million, six hundred eighty-three thousand, two hundred twenty-three".