19946988368 has 40 divisors (see below), whose sum is σ = 39197009088. Its totient is φ = 9831773952.

The previous prime is 19946988361. The next prime is 19946988371. The reversal of 19946988368 is 86388964991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19946988361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3317621 + ... + 3323627.

Almost surely, 2^19946988368 is an apocalyptic number.

It is an amenable number.

19946988368 is a deficient number, since it is larger than the sum of its proper divisors (19250020720).

19946988368 is a wasteful number, since it uses less digits than its factorization.

19946988368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931 (or 8925 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 71.

The spelling of 19946988368 in words is "nineteen billion, nine hundred forty-six million, nine hundred eighty-eight thousand, three hundred sixty-eight".