19403331797 has 2 divisors, whose sum is σ = 19403331798. Its totient is φ = 19403331796.

The previous prime is 19403331763. The next prime is 19403331817. The reversal of 19403331797 is 79713330491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10981782436 + 8421549361 = 104794^2 + 91769^2 .

It is a cyclic number.

It is not a de Polignac number, because 19403331797 - 2¹⁰ = 19403330773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19403331097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9701665898 + 9701665899.

It is an arithmetic number, because the mean of its divisors is an integer number (9701665899).

Almost surely, 2^19403331797 is an apocalyptic number.

It is an amenable number.

19403331797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19403331797 is an equidigital number, since it uses as much as digits as its factorization.

19403331797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 428652, while the sum is 47.

The spelling of 19403331797 in words is "nineteen billion, four hundred three million, three hundred thirty-one thousand, seven hundred ninety-seven".