19319475793 has 2 divisors, whose sum is σ = 19319475794. Its totient is φ = 19319475792.

The previous prime is 19319475787. The next prime is 19319475797. The reversal of 19319475793 is 39757491391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13590196929 + 5729278864 = 116577^2 + 75692^2 .

It is a cyclic number.

It is not a de Polignac number, because 19319475793 - 2⁹ = 19319475281 is a prime.

It is not a weakly prime, because it can be changed into another prime (19319475797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9659737896 + 9659737897.

It is an arithmetic number, because the mean of its divisors is an integer number (9659737897).

Almost surely, 2^19319475793 is an apocalyptic number.

It is an amenable number.

19319475793 is a deficient number, since it is larger than the sum of its proper divisors (1).

19319475793 is an equidigital number, since it uses as much as digits as its factorization.

19319475793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6429780, while the sum is 58.

The spelling of 19319475793 in words is "nineteen billion, three hundred nineteen million, four hundred seventy-five thousand, seven hundred ninety-three".