19979867512396 has 24 divisors (see below), whose sum is σ = 38789881462080. Its totient is φ = 8927829858000.

The previous prime is 19979867512379. The next prime is 19979867512469. The reversal of 19979867512396 is 69321576897991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3848199930 + ... + 3848205121.

It is an arithmetic number, because the mean of its divisors is an integer number (1616245060920).

Almost surely, 2^{19979867512396} is an apocalyptic number.

It is an amenable number.

19979867512396 is a deficient number, since it is larger than the sum of its proper divisors (18810013949684).

19979867512396 is a wasteful number, since it uses less digits than its factorization.

19979867512396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7696405125 (or 7696405123 counting only the distinct ones).

The product of its digits is 2777664960, while the sum is 82.

The spelling of 19979867512396 in words is "nineteen trillion, nine hundred seventy-nine billion, eight hundred sixty-seven million, five hundred twelve thousand, three hundred ninety-six".