19201819019 has 2 divisors, whose sum is σ = 19201819020. Its totient is φ = 19201819018.

The previous prime is 19201818983. The next prime is 19201819051. The reversal of 19201819019 is 91091810291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19201819019 - 2²⁰ = 19200770443 is a prime.

It is a super-2 number, since 2×19201819019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19201813019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9600909509 + 9600909510.

It is an arithmetic number, because the mean of its divisors is an integer number (9600909510).

Almost surely, 2^19201819019 is an apocalyptic number.

19201819019 is a deficient number, since it is larger than the sum of its proper divisors (1).

19201819019 is an equidigital number, since it uses as much as digits as its factorization.

19201819019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 19201819019 in words is "nineteen billion, two hundred one million, eight hundred nineteen thousand, nineteen".