19904798071 has 2 divisors, whose sum is σ = 19904798072. Its totient is φ = 19904798070.

The previous prime is 19904798047. The next prime is 19904798093. The reversal of 19904798071 is 17089740991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19904798071 - 2²¹ = 19902700919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19904898071) 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, 9952399035 + 9952399036.

It is an arithmetic number, because the mean of its divisors is an integer number (9952399036).

Almost surely, 2^19904798071 is an apocalyptic number.

19904798071 is a deficient number, since it is larger than the sum of its proper divisors (1).

19904798071 is an equidigital number, since it uses as much as digits as its factorization.

19904798071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 19904798071 in words is "nineteen billion, nine hundred four million, seven hundred ninety-eight thousand, seventy-one".