20225844 has 18 divisors (see below), whose sum is σ = 51126530. Its totient is φ = 6741936.

The previous prime is 20225837. The next prime is 20225851. The reversal of 20225844 is 44852202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20225837) and next prime (20225851).

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 3920400 = 4038^2 + 1980^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 280879 + ... + 280950.

Almost surely, 2^20225844 is an apocalyptic number.

It is an amenable number.

20225844 is an abundant number, since it is smaller than the sum of its proper divisors (30900686).

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

20225844 is a wasteful number, since it uses less digits than its factorization.

20225844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561839 (or 561834 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20225844 is about 4497.3151990938. The cubic root of 20225844 is about 272.4596646524.

The spelling of 20225844 in words is "twenty million, two hundred twenty-five thousand, eight hundred forty-four".