19816236019 has 2 divisors, whose sum is σ = 19816236020. Its totient is φ = 19816236018.

The previous prime is 19816235983. The next prime is 19816236059. The reversal of 19816236019 is 91063261891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19816236019 - 2¹⁹ = 19815711731 is a prime.

It is a super-2 number, since 2×19816236019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19816236019.

It is not a weakly prime, because it can be changed into another prime (19816236059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9908118009 + 9908118010.

It is an arithmetic number, because the mean of its divisors is an integer number (9908118010).

Almost surely, 2^19816236019 is an apocalyptic number.

19816236019 is a deficient number, since it is larger than the sum of its proper divisors (1).

19816236019 is an equidigital number, since it uses as much as digits as its factorization.

19816236019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 19816236019 in words is "nineteen billion, eight hundred sixteen million, two hundred thirty-six thousand, nineteen".