19660312672 has 192 divisors, whose sum is σ = 52271751168. Its totient is φ = 7029504000.

The previous prime is 19660312663. The next prime is 19660312673. The reversal of 19660312672 is 27621306691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19660312673) 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 31 ways as a sum of consecutive naturals, for example, 5796097 + ... + 5799487.

It is an arithmetic number, because the mean of its divisors is an integer number (272248704).

Almost surely, 2^19660312672 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 19660312672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26135875584).

19660312672 is an abundant number, since it is smaller than the sum of its proper divisors (32611438496).

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

19660312672 is a wasteful number, since it uses less digits than its factorization.

19660312672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 19660312672 in words is "nineteen billion, six hundred sixty million, three hundred twelve thousand, six hundred seventy-two".