19119807871 has 2 divisors, whose sum is σ = 19119807872. Its totient is φ = 19119807870.

The previous prime is 19119807821. The next prime is 19119807937. The reversal of 19119807871 is 17870891191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19119807871 - 2²⁹ = 18582936959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19119807821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9559903935 + 9559903936.

It is an arithmetic number, because the mean of its divisors is an integer number (9559903936).

Almost surely, 2^19119807871 is an apocalyptic number.

19119807871 is a deficient number, since it is larger than the sum of its proper divisors (1).

19119807871 is an equidigital number, since it uses as much as digits as its factorization.

19119807871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 52.

The spelling of 19119807871 in words is "nineteen billion, one hundred nineteen million, eight hundred seven thousand, eight hundred seventy-one".