19713677556 has 48 divisors (see below), whose sum is σ = 47288586240. Its totient is φ = 6388792800.

The previous prime is 19713677549. The next prime is 19713677561. The reversal of 19713677556 is 65577631791.

It is a junction number, because it is equal to n+sod(n) for n = 19713677496 and 19713677505.

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 15 ways as a sum of consecutive naturals, for example, 30576 + ... + 200903.

It is an arithmetic number, because the mean of its divisors is an integer number (985178880).

Almost surely, 2^19713677556 is an apocalyptic number.

It is an amenable number.

19713677556 is an abundant number, since it is smaller than the sum of its proper divisors (27574908684).

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

19713677556 is a wasteful number, since it uses less digits than its factorization.

19713677556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231684 (or 231682 counting only the distinct ones).

The product of its digits is 8334900, while the sum is 57.

The spelling of 19713677556 in words is "nineteen billion, seven hundred thirteen million, six hundred seventy-seven thousand, five hundred fifty-six".