19609823551 has 2 divisors, whose sum is σ = 19609823552. Its totient is φ = 19609823550.

The previous prime is 19609823549. The next prime is 19609823567. The reversal of 19609823551 is 15532890691.

It is a weak prime.

It is an emirp because it is prime and its reverse (15532890691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19609823551 - 2¹ = 19609823549 is a prime.

Together with 19609823549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 19609823495 and 19609823504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19609823581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9804911775 + 9804911776.

It is an arithmetic number, because the mean of its divisors is an integer number (9804911776).

Almost surely, 2^19609823551 is an apocalyptic number.

19609823551 is a deficient number, since it is larger than the sum of its proper divisors (1).

19609823551 is an equidigital number, since it uses as much as digits as its factorization.

19609823551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 49.

The spelling of 19609823551 in words is "nineteen billion, six hundred nine million, eight hundred twenty-three thousand, five hundred fifty-one".