19786628649968 has 20 divisors (see below), whose sum is σ = 38371539800880. Its totient is φ = 9884295798144.

The previous prime is 19786628649871. The next prime is 19786628650027. The reversal of 19786628649968 is 86994682668791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563639828 + ... + 563674931.

It is an arithmetic number, because the mean of its divisors is an integer number (1918576990044).

Almost surely, 2^{19786628649968} is an apocalyptic number.

It is an amenable number.

19786628649968 is a deficient number, since it is larger than the sum of its proper divisors (18584911150912).

19786628649968 is a wasteful number, since it uses less digits than its factorization.

19786628649968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127315864 (or 1127315858 counting only the distinct ones).

The product of its digits is 27088846848, while the sum is 89.

The spelling of 19786628649968 in words is "nineteen trillion, seven hundred eighty-six billion, six hundred twenty-eight million, six hundred forty-nine thousand, nine hundred sixty-eight".