19396639963864 has 16 divisors (see below), whose sum is σ = 36370872616320. Its totient is φ = 9697740599520.

The previous prime is 19396639963837. The next prime is 19396639963903. The reversal of 19396639963864 is 46836993669391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72280504 + ... + 72548359.

It is an arithmetic number, because the mean of its divisors is an integer number (2273179538520).

Almost surely, 2^{19396639963864} is an apocalyptic number.

It is an amenable number.

19396639963864 is a deficient number, since it is larger than the sum of its proper divisors (16974232652456).

19396639963864 is a wasteful number, since it uses less digits than its factorization.

19396639963864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144845610 (or 144845606 counting only the distinct ones).

The product of its digits is 7346640384, while the sum is 82.

The spelling of 19396639963864 in words is "nineteen trillion, three hundred ninety-six billion, six hundred thirty-nine million, nine hundred sixty-three thousand, eight hundred sixty-four".