19315644911 has 2 divisors, whose sum is σ = 19315644912. Its totient is φ = 19315644910.

The previous prime is 19315644877. The next prime is 19315644917. The reversal of 19315644911 is 11944651391.

It is a strong prime.

It is an emirp because it is prime and its reverse (11944651391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19315644911 - 2⁶ = 19315644847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19315644917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9657822455 + 9657822456.

It is an arithmetic number, because the mean of its divisors is an integer number (9657822456).

Almost surely, 2^19315644911 is an apocalyptic number.

19315644911 is a deficient number, since it is larger than the sum of its proper divisors (1).

19315644911 is an equidigital number, since it uses as much as digits as its factorization.

19315644911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The spelling of 19315644911 in words is "nineteen billion, three hundred fifteen million, six hundred forty-four thousand, nine hundred eleven".