19963864886 has 36 divisors (see below), whose sum is σ = 36077680548. Its totient is φ = 8260875504.

The previous prime is 19963864883. The next prime is 19963864909. The reversal of 19963864886 is 68846836991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19963864883) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38696 + ... + 203531.

It is an arithmetic number, because the mean of its divisors is an integer number (1002157793).

Almost surely, 2^19963864886 is an apocalyptic number.

19963864886 is a deficient number, since it is larger than the sum of its proper divisors (16113815662).

19963864886 is a wasteful number, since it uses less digits than its factorization.

19963864886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242301 (or 242265 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 68.

The spelling of 19963864886 in words is "nineteen billion, nine hundred sixty-three million, eight hundred sixty-four thousand, eight hundred eighty-six".