19668780068 has 48 divisors (see below), whose sum is σ = 39799947264. Its totient is φ = 8330908320.

The previous prime is 19668780067. The next prime is 19668780083. The reversal of 19668780068 is 86008786691.

It is a junction number, because it is equal to n+sod(n) for n = 19668779989 and 19668780016.

It is not an unprimeable number, because it can be changed into a prime (19668780067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924713 + ... + 945743.

It is an arithmetic number, because the mean of its divisors is an integer number (829165568).

Almost surely, 2^19668780068 is an apocalyptic number.

It is an amenable number.

19668780068 is an abundant number, since it is smaller than the sum of its proper divisors (20131167196).

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

19668780068 is a wasteful number, since it uses less digits than its factorization.

19668780068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21432 (or 21430 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 19668780068 in words is "nineteen billion, six hundred sixty-eight million, seven hundred eighty thousand, sixty-eight".