19689704273 has 2 divisors, whose sum is σ = 19689704274. Its totient is φ = 19689704272.

The previous prime is 19689704263. The next prime is 19689704297. The reversal of 19689704273 is 37240798691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16457554369 + 3232149904 = 128287^2 + 56852^2 .

It is an emirp because it is prime and its reverse (37240798691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19689704273 - 2³⁴ = 2509835089 is a prime.

It is not a weakly prime, because it can be changed into another prime (19689704213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844852136 + 9844852137.

It is an arithmetic number, because the mean of its divisors is an integer number (9844852137).

Almost surely, 2^19689704273 is an apocalyptic number.

It is an amenable number.

19689704273 is a deficient number, since it is larger than the sum of its proper divisors (1).

19689704273 is an equidigital number, since it uses as much as digits as its factorization.

19689704273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 19689704273 in words is "nineteen billion, six hundred eighty-nine million, seven hundred four thousand, two hundred seventy-three".