19708427087 has 2 divisors, whose sum is σ = 19708427088. Its totient is φ = 19708427086.

The previous prime is 19708427017. The next prime is 19708427113. The reversal of 19708427087 is 78072480791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19708427087 - 2¹⁰ = 19708426063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19708427017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9854213543 + 9854213544.

It is an arithmetic number, because the mean of its divisors is an integer number (9854213544).

Almost surely, 2^19708427087 is an apocalyptic number.

19708427087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19708427087 is an equidigital number, since it uses as much as digits as its factorization.

19708427087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 53.

The spelling of 19708427087 in words is "nineteen billion, seven hundred eight million, four hundred twenty-seven thousand, eighty-seven".