19863734219 has 6 divisors (see below), whose sum is σ = 23106792924. Its totient is φ = 17026057860.

The previous prime is 19863734213. The next prime is 19863734249. The reversal of 19863734219 is 91243736891.

It is a de Polignac number, because none of the positive numbers 2^k-19863734219 is a prime.

It is a super-2 number, since 2×19863734219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19863734213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202691117 + ... + 202691214.

It is an arithmetic number, because the mean of its divisors is an integer number (3851132154).

Almost surely, 2^19863734219 is an apocalyptic number.

19863734219 is a deficient number, since it is larger than the sum of its proper divisors (3243058705).

19863734219 is an equidigital number, since it uses as much as digits as its factorization.

19863734219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405382345 (or 405382338 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The spelling of 19863734219 in words is "nineteen billion, eight hundred sixty-three million, seven hundred thirty-four thousand, two hundred nineteen".