19996662256 has 20 divisors (see below), whose sum is σ = 39119687152. Its totient is φ = 9901259136.

The previous prime is 19996662241. The next prime is 19996662307. The reversal of 19996662256 is 65226669991.

It is a junction number, because it is equal to n+sod(n) for n = 19996662194 and 19996662203.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6065301 + ... + 6068596.

Almost surely, 2^19996662256 is an apocalyptic number.

19996662256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19996662256 is a deficient number, since it is larger than the sum of its proper divisors (19123024896).

19996662256 is a wasteful number, since it uses less digits than its factorization.

19996662256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12134008 (or 12134002 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 61.

The spelling of 19996662256 in words is "nineteen billion, nine hundred ninety-six million, six hundred sixty-two thousand, two hundred fifty-six".