19676805791 has 2 divisors, whose sum is σ = 19676805792. Its totient is φ = 19676805790.

The previous prime is 19676805773. The next prime is 19676805793. The reversal of 19676805791 is 19750867691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19676805791 is a prime.

It is a super-2 number, since 2×19676805791² (a number of 21 digits) contains 22 as substring.

Together with 19676805793, 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 19676805791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19676805793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9838402895 + 9838402896.

It is an arithmetic number, because the mean of its divisors is an integer number (9838402896).

Almost surely, 2^19676805791 is an apocalyptic number.

19676805791 is a deficient number, since it is larger than the sum of its proper divisors (1).

19676805791 is an equidigital number, since it uses as much as digits as its factorization.

19676805791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 19676805791 in words is "nineteen billion, six hundred seventy-six million, eight hundred five thousand, seven hundred ninety-one".