20568688 has 40 divisors (see below), whose sum is σ = 46012928. Its totient is φ = 8724672.

The previous prime is 20568683. The next prime is 20568689. The reversal of 20568688 is 88686502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20568683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10645 + ... + 12427.

Almost surely, 2^20568688 is an apocalyptic number.

20568688 is a gapful number since it is divisible by the number (28) 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 20568688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23006464).

20568688 is an abundant number, since it is smaller than the sum of its proper divisors (25444240).

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

20568688 is a wasteful number, since it uses less digits than its factorization.

20568688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 20568688 is about 4535.2715464457. The cubic root of 20568688 is about 273.9905159486.

The spelling of 20568688 in words is "twenty million, five hundred sixty-eight thousand, six hundred eighty-eight".