20225856 has 112 divisors (see below), whose sum is σ = 62179200. Its totient is φ = 5683200.

The previous prime is 20225851. The next prime is 20225897. The reversal of 20225856 is 65852202.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225851) 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 15 ways as a sum of consecutive naturals, for example, 135670 + ... + 135818.

Almost surely, 2^20225856 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 20225856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31089600).

20225856 is an abundant number, since it is smaller than the sum of its proper divisors (41953344).

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

20225856 is a wasteful number, since it uses less digits than its factorization.

20225856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20225856 is about 4497.3165332229. The cubic root of 20225856 is about 272.4597185359.

The spelling of 20225856 in words is "twenty million, two hundred twenty-five thousand, eight hundred fifty-six".