19419965863 has 2 divisors, whose sum is σ = 19419965864. Its totient is φ = 19419965862.

The previous prime is 19419965857. The next prime is 19419965881. The reversal of 19419965863 is 36856991491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19419965863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19419965833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9709982931 + 9709982932.

It is an arithmetic number, because the mean of its divisors is an integer number (9709982932).

Almost surely, 2^19419965863 is an apocalyptic number.

19419965863 is a deficient number, since it is larger than the sum of its proper divisors (1).

19419965863 is an equidigital number, since it uses as much as digits as its factorization.

19419965863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12597120, while the sum is 61.

It can be divided in two parts, 194199 and 65863, that added together give a palindrome (260062).

The spelling of 19419965863 in words is "nineteen billion, four hundred nineteen million, nine hundred sixty-five thousand, eight hundred sixty-three".