19941968548 has 36 divisors (see below), whose sum is σ = 37958576880. Its totient is φ = 9141446160.

The previous prime is 19941968531. The next prime is 19941968569. The reversal of 19941968548 is 84586914991.

It is a self number, because there is not a number n which added to its sum of digits gives 19941968548.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 63486 + ... + 209557.

Almost surely, 2^19941968548 is an apocalyptic number.

It is an amenable number.

19941968548 is a deficient number, since it is larger than the sum of its proper divisors (18016608332).

19941968548 is a wasteful number, since it uses less digits than its factorization.

19941968548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273128 (or 273095 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 64.

The spelling of 19941968548 in words is "nineteen billion, nine hundred forty-one million, nine hundred sixty-eight thousand, five hundred forty-eight".