20056615552 has 64 divisors (see below), whose sum is σ = 40417043040. Its totient is φ = 9913062400.

The previous prime is 20056615541. The next prime is 20056615561. The reversal of 20056615552 is 25551665002.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 15344883 + ... + 15346189.

Almost surely, 2^20056615552 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 20056615552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20208521520).

20056615552 is an abundant number, since it is smaller than the sum of its proper divisors (20360427488).

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

20056615552 is a wasteful number, since it uses less digits than its factorization.

20056615552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609 (or 2597 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 20056615552 in words is "twenty billion, fifty-six million, six hundred fifteen thousand, five hundred fifty-two".