20885568 has 168 divisors, whose sum is σ = 64861440. Its totient is φ = 5913600.

The previous prime is 20885563. The next prime is 20885569. The reversal of 20885568 is 86558802.

It is not an unprimeable number, because it can be changed into a prime (20885561) 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, 673713 + ... + 673743.

It is an arithmetic number, because the mean of its divisors is an integer number (386080).

Almost surely, 2^20885568 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 20885568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32430720).

20885568 is an abundant number, since it is smaller than the sum of its proper divisors (43975872).

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

20885568 is a wasteful number, since it uses less digits than its factorization.

20885568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 20885568 is about 4570.0730847548. The cubic root of 20885568 is about 275.3903789050.

It can be divided in two parts, 20 and 885568, that added together give a palindrome (885588).

The spelling of 20885568 in words is "twenty million, eight hundred eighty-five thousand, five hundred sixty-eight".