19706972756 has 24 divisors (see below), whose sum is σ = 35327181120. Its totient is φ = 9613985472.

The previous prime is 19706972749. The next prime is 19706972759. The reversal of 19706972756 is 65727960791.

It is a junction number, because it is equal to n+sod(n) for n = 19706972695 and 19706972704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19706972759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100025 + ... + 222303.

It is an arithmetic number, because the mean of its divisors is an integer number (1471965880).

Almost surely, 2^19706972756 is an apocalyptic number.

It is an amenable number.

19706972756 is a deficient number, since it is larger than the sum of its proper divisors (15620208364).

19706972756 is a wasteful number, since it uses less digits than its factorization.

19706972756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123263 (or 123261 counting only the distinct ones).

The product of its (nonzero) digits is 10001880, while the sum is 59.

The spelling of 19706972756 in words is "nineteen billion, seven hundred six million, nine hundred seventy-two thousand, seven hundred fifty-six".