20528208 has 160 divisors (see below), whose sum is σ = 64579200. Its totient is φ = 6220800.

The previous prime is 20528203. The next prime is 20528251. The reversal of 20528208 is 80282502.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20528203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336498 + ... + 336558.

It is an arithmetic number, because the mean of its divisors is an integer number (403620).

Almost surely, 2^20528208 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 20528208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32289600).

20528208 is an abundant number, since it is smaller than the sum of its proper divisors (44050992).

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

20528208 is a wasteful number, since it uses less digits than its factorization.

20528208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20528208 is about 4530.8065507148. The cubic root of 20528208 is about 273.8106564783.

It can be divided in two parts, 20528 and 208, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20528208 in words is "twenty million, five hundred twenty-eight thousand, two hundred eight".