19668016951686 has 12 divisors (see below), whose sum is σ = 42614036728692. Its totient is φ = 6556005650556.

The previous prime is 19668016951633. The next prime is 19668016951721. The reversal of 19668016951686 is 68615961086691.

19668016951686 is a `hidden beast` number, since 1 + 96 + 6 + 8 + 0 + 16 + 9 + 516 + 8 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 546333804196 + ... + 546333804231.

It is an arithmetic number, because the mean of its divisors is an integer number (3551169727391).

Almost surely, 2^{19668016951686} is an apocalyptic number.

19668016951686 is an abundant number, since it is smaller than the sum of its proper divisors (22946019777006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19668016951686 is a wasteful number, since it uses less digits than its factorization.

19668016951686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092667608435 (or 1092667608432 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 72.

The spelling of 19668016951686 in words is "nineteen trillion, six hundred sixty-eight billion, sixteen million, nine hundred fifty-one thousand, six hundred eighty-six".