19673668560 has 720 divisors, whose sum is σ = 81021332160. Its totient is φ = 3924910080.

The previous prime is 19673668559. The next prime is 19673668603. The reversal of 19673668560 is 6586637691.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 19673668560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 37761100 + ... + 37761620.

It is an arithmetic number, because the mean of its divisors is an integer number (112529628).

Almost surely, 2^19673668560 is an apocalyptic number.

19673668560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19673668560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40510666080).

19673668560 is an abundant number, since it is smaller than the sum of its proper divisors (61347663600).

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

19673668560 is a wasteful number, since it uses less digits than its factorization.

19673668560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 19673668560 in words is "nineteen billion, six hundred seventy-three million, six hundred sixty-eight thousand, five hundred sixty".