19969502711 has 2 divisors, whose sum is σ = 19969502712. Its totient is φ = 19969502710.

The previous prime is 19969502669. The next prime is 19969502713. The reversal of 19969502711 is 11720596991.

It is a strong prime.

It is an emirp because it is prime and its reverse (11720596991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19969502711 - 2⁶ = 19969502647 is a prime.

Together with 19969502713, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19969502711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19969502713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9984751355 + 9984751356.

It is an arithmetic number, because the mean of its divisors is an integer number (9984751356).

Almost surely, 2^19969502711 is an apocalyptic number.

19969502711 is a deficient number, since it is larger than the sum of its proper divisors (1).

19969502711 is an equidigital number, since it uses as much as digits as its factorization.

19969502711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 50.

The spelling of 19969502711 in words is "nineteen billion, nine hundred sixty-nine million, five hundred two thousand, seven hundred eleven".