19797656676 has 96 divisors (see below), whose sum is σ = 54070910208. Its totient is φ = 5520752640.

The previous prime is 19797656653. The next prime is 19797656687. The reversal of 19797656676 is 67665679791.

It is a self number, because there is not a number n which added to its sum of digits gives 19797656676.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 847716 + ... + 870756.

It is an arithmetic number, because the mean of its divisors is an integer number (563238648).

Almost surely, 2^19797656676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19797656676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27035455104).

19797656676 is an abundant number, since it is smaller than the sum of its proper divisors (34273253532).

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

19797656676 is a wasteful number, since it uses less digits than its factorization.

19797656676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23301 (or 23299 counting only the distinct ones).

The product of its digits is 180033840, while the sum is 69.

The spelling of 19797656676 in words is "nineteen billion, seven hundred ninety-seven million, six hundred fifty-six thousand, six hundred seventy-six".