19993068966 has 16 divisors (see below), whose sum is σ = 43061994864. Its totient is φ = 6151713504.

The previous prime is 19993068947. The next prime is 19993068971. The reversal of 19993068966 is 66986039991.

It is a junction number, because it is equal to n+sod(n) for n = 19993068897 and 19993068906.

It is a congruent number.

It is an unprimeable number.

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, 128160621 + ... + 128160776.

It is an arithmetic number, because the mean of its divisors is an integer number (2691374679).

Almost surely, 2^19993068966 is an apocalyptic number.

19993068966 is an abundant number, since it is smaller than the sum of its proper divisors (23068925898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19993068966 is a wasteful number, since it uses less digits than its factorization.

19993068966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256321415.

The product of its (nonzero) digits is 34012224, while the sum is 66.

The spelling of 19993068966 in words is "nineteen billion, nine hundred ninety-three million, sixty-eight thousand, nine hundred sixty-six".