19926368911 has 2 divisors, whose sum is σ = 19926368912. Its totient is φ = 19926368910.

The previous prime is 19926368909. The next prime is 19926368923. The reversal of 19926368911 is 11986362991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19926368911 - 2¹ = 19926368909 is a prime.

Together with 19926368909, 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 (19926363911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9963184455 + 9963184456.

It is an arithmetic number, because the mean of its divisors is an integer number (9963184456).

Almost surely, 2^19926368911 is an apocalyptic number.

19926368911 is a deficient number, since it is larger than the sum of its proper divisors (1).

19926368911 is an equidigital number, since it uses as much as digits as its factorization.

19926368911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 55.

The spelling of 19926368911 in words is "nineteen billion, nine hundred twenty-six million, three hundred sixty-eight thousand, nine hundred eleven".