19863418965 has 16 divisors (see below), whose sum is σ = 34226199168. Its totient is φ = 9778913856.

The previous prime is 19863418963. The next prime is 19863419029. The reversal of 19863418965 is 56981436891.

It is not a de Polignac number, because 19863418965 - 2¹ = 19863418963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19863418899 and 19863418908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19863418963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50931649 + ... + 50932038.

It is an arithmetic number, because the mean of its divisors is an integer number (2139137448).

Almost surely, 2^19863418965 is an apocalyptic number.

19863418965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19863418965 is a deficient number, since it is larger than the sum of its proper divisors (14362780203).

19863418965 is a wasteful number, since it uses less digits than its factorization.

19863418965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101863708.

The product of its digits is 11197440, while the sum is 60.

The spelling of 19863418965 in words is "nineteen billion, eight hundred sixty-three million, four hundred eighteen thousand, nine hundred sixty-five".