19990775068 has 12 divisors (see below), whose sum is σ = 38164207032. Its totient is φ = 9086715920.

The previous prime is 19990774987. The next prime is 19990775111. The reversal of 19990775068 is 86057709991.

It is a junction number, because it is equal to n+sod(n) for n = 19990774997 and 19990775015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227167855 + ... + 227167942.

It is an arithmetic number, because the mean of its divisors is an integer number (3180350586).

Almost surely, 2^19990775068 is an apocalyptic number.

It is an amenable number.

19990775068 is a deficient number, since it is larger than the sum of its proper divisors (18173431964).

19990775068 is a wasteful number, since it uses less digits than its factorization.

19990775068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454335812 (or 454335810 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 61.

The spelling of 19990775068 in words is "nineteen billion, nine hundred ninety million, seven hundred seventy-five thousand, sixty-eight".