19604646572 has 48 divisors (see below), whose sum is σ = 40383705600. Its totient is φ = 8323405776.

The previous prime is 19604646571. The next prime is 19604646577. The reversal of 19604646572 is 27564640691.

It is a self number, because there is not a number n which added to its sum of digits gives 19604646572.

It is not an unprimeable number, because it can be changed into a prime (19604646571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80033 + ... + 213575.

It is an arithmetic number, because the mean of its divisors is an integer number (841327200).

Almost surely, 2^19604646572 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 19604646572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20191852800).

19604646572 is an abundant number, since it is smaller than the sum of its proper divisors (20779059028).

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

19604646572 is a wasteful number, since it uses less digits than its factorization.

19604646572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133675 (or 133659 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 19604646572 in words is "nineteen billion, six hundred four million, six hundred forty-six thousand, five hundred seventy-two".