19438218463 has 2 divisors, whose sum is σ = 19438218464. Its totient is φ = 19438218462.

The previous prime is 19438218433. The next prime is 19438218493. The reversal of 19438218463 is 36481283491.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (19438218433) and next prime (19438218493).

It is a cyclic number.

It is not a de Polignac number, because 19438218463 - 2²⁹ = 18901347551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19438218403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719109231 + 9719109232.

It is an arithmetic number, because the mean of its divisors is an integer number (9719109232).

Almost surely, 2^19438218463 is an apocalyptic number.

19438218463 is a deficient number, since it is larger than the sum of its proper divisors (1).

19438218463 is an equidigital number, since it uses as much as digits as its factorization.

19438218463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The spelling of 19438218463 in words is "nineteen billion, four hundred thirty-eight million, two hundred eighteen thousand, four hundred sixty-three".