19544795423 has 2 divisors, whose sum is σ = 19544795424. Its totient is φ = 19544795422.

The previous prime is 19544795419. The next prime is 19544795437. The reversal of 19544795423 is 32459744591.

It is a weak prime.

It is an emirp because it is prime and its reverse (32459744591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19544795423 - 2² = 19544795419 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19544795453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9772397711 + 9772397712.

It is an arithmetic number, because the mean of its divisors is an integer number (9772397712).

Almost surely, 2^19544795423 is an apocalyptic number.

19544795423 is a deficient number, since it is larger than the sum of its proper divisors (1).

19544795423 is an equidigital number, since it uses as much as digits as its factorization.

19544795423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The spelling of 19544795423 in words is "nineteen billion, five hundred forty-four million, seven hundred ninety-five thousand, four hundred twenty-three".