19604808887 has 2 divisors, whose sum is σ = 19604808888. Its totient is φ = 19604808886.

The previous prime is 19604808739. The next prime is 19604808907. The reversal of 19604808887 is 78880840691.

It is a strong prime.

It is an emirp because it is prime and its reverse (78880840691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19604808887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19604888887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9802404443 + 9802404444.

It is an arithmetic number, because the mean of its divisors is an integer number (9802404444).

Almost surely, 2^19604808887 is an apocalyptic number.

19604808887 is a deficient number, since it is larger than the sum of its proper divisors (1).

19604808887 is an equidigital number, since it uses as much as digits as its factorization.

19604808887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6193152, while the sum is 59.

The spelling of 19604808887 in words is "nineteen billion, six hundred four million, eight hundred eight thousand, eight hundred eighty-seven".