19909319064196 has 27 divisors (see below), whose sum is σ = 34942250513079. Its totient is φ = 9925902032328.

The previous prime is 19909319064191. The next prime is 19909319064199. The reversal of 19909319064196 is 69146091390991.

The square root of 19909319064196 is 4461986.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19909319064191) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3275094685 + ... + 3275100763.

Almost surely, 2^{19909319064196} is an apocalyptic number.

19909319064196 is the 4461986-th square number.

It is an amenable number.

19909319064196 is a deficient number, since it is larger than the sum of its proper divisors (15032931448883).

19909319064196 is an frugal number, since it uses more digits than its factorization.

19909319064196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12896 (or 6448 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 67.

The spelling of 19909319064196 in words is "nineteen trillion, nine hundred nine billion, three hundred nineteen million, sixty-four thousand, one hundred ninety-six".