19560905056 has 144 divisors (see below), whose sum is σ = 49170385152. Its totient is φ = 7574380800.

The previous prime is 19560905053. The next prime is 19560905057. The reversal of 19560905056 is 65050906591.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19560904997 and 19560905015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19560905051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2877021 + ... + 2883811.

It is an arithmetic number, because the mean of its divisors is an integer number (341461008).

Almost surely, 2^19560905056 is an apocalyptic number.

19560905056 is a gapful number since it is divisible by the number (16) 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 19560905056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24585192576).

19560905056 is an abundant number, since it is smaller than the sum of its proper divisors (29609480096).

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

19560905056 is a wasteful number, since it uses less digits than its factorization.

19560905056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 46.

The spelling of 19560905056 in words is "nineteen billion, five hundred sixty million, nine hundred five thousand, fifty-six".