19428796391 has 2 divisors, whose sum is σ = 19428796392. Its totient is φ = 19428796390.

The previous prime is 19428796381. The next prime is 19428796393. The reversal of 19428796391 is 19369782491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19428796391 - 2⁶ = 19428796327 is a prime.

It is a Sophie Germain prime.

Together with 19428796393, 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 19428796391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428796393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714398195 + 9714398196.

It is an arithmetic number, because the mean of its divisors is an integer number (9714398196).

Almost surely, 2^19428796391 is an apocalyptic number.

19428796391 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428796391 is an equidigital number, since it uses as much as digits as its factorization.

19428796391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The spelling of 19428796391 in words is "nineteen billion, four hundred twenty-eight million, seven hundred ninety-six thousand, three hundred ninety-one".