19960657568 has 12 divisors (see below), whose sum is σ = 39297544650. Its totient is φ = 9980328768.

The previous prime is 19960657481. The next prime is 19960657579. The reversal of 19960657568 is 86575606991.

It can be written as a sum of positive squares in only one way, i.e., 16934337424 + 3026320144 = 130132^2 + 55012^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19960657568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311885243 + ... + 311885306.

Almost surely, 2^19960657568 is an apocalyptic number.

It is an amenable number.

19960657568 is a deficient number, since it is larger than the sum of its proper divisors (19336887082).

19960657568 is an equidigital number, since it uses as much as digits as its factorization.

19960657568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623770559 (or 623770551 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 62.

The spelling of 19960657568 in words is "nineteen billion, nine hundred sixty million, six hundred fifty-seven thousand, five hundred sixty-eight".