20716056 has 48 divisors (see below), whose sum is σ = 56651400. Its totient is φ = 6838272.

The previous prime is 20716043. The next prime is 20716079. The reversal of 20716056 is 65061702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6360 + ... + 9048.

Almost surely, 2^20716056 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 20716056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28325700).

20716056 is an abundant number, since it is smaller than the sum of its proper divisors (35935344).

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

20716056 is a wasteful number, since it uses less digits than its factorization.

20716056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808 (or 2801 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20716056 is about 4551.4894265504. The cubic root of 20716056 is about 274.6433105578.

Adding to 20716056 its reverse (65061702), we get a palindrome (85777758).

The spelling of 20716056 in words is "twenty million, seven hundred sixteen thousand, fifty-six".