19116997927 has 2 divisors, whose sum is σ = 19116997928. Its totient is φ = 19116997926.

The previous prime is 19116997873. The next prime is 19116997937. The reversal of 19116997927 is 72979961191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19116997927 - 2¹¹ = 19116995879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19116997937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9558498963 + 9558498964.

It is an arithmetic number, because the mean of its divisors is an integer number (9558498964).

Almost surely, 2^19116997927 is an apocalyptic number.

19116997927 is a deficient number, since it is larger than the sum of its proper divisors (1).

19116997927 is an equidigital number, since it uses as much as digits as its factorization.

19116997927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 61.

The spelling of 19116997927 in words is "nineteen billion, one hundred sixteen million, nine hundred ninety-seven thousand, nine hundred twenty-seven".