19708859461 has 2 divisors, whose sum is σ = 19708859462. Its totient is φ = 19708859460.

The previous prime is 19708859437. The next prime is 19708859483. The reversal of 19708859461 is 16495880791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14052917025 + 5655942436 = 118545^2 + 75206^2 .

It is a cyclic number.

It is not a de Polignac number, because 19708859461 - 2¹⁹ = 19708335173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19708859396 and 19708859405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19708859161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9854429730 + 9854429731.

It is an arithmetic number, because the mean of its divisors is an integer number (9854429731).

Almost surely, 2^19708859461 is an apocalyptic number.

It is an amenable number.

19708859461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19708859461 is an equidigital number, since it uses as much as digits as its factorization.

19708859461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 19708859461 in words is "nineteen billion, seven hundred eight million, eight hundred fifty-nine thousand, four hundred sixty-one".