20205044 has 12 divisors (see below), whose sum is σ = 37438884. Its totient is φ = 9508224.

The previous prime is 20205041. The next prime is 20205077. The reversal of 20205044 is 44050202.

It can be written as a sum of positive squares in 2 ways, for example, as 14915044 + 5290000 = 3862^2 + 2300^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205041) 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 3 ways as a sum of consecutive naturals, for example, 148499 + ... + 148634.

It is an arithmetic number, because the mean of its divisors is an integer number (3119907).

Almost surely, 2^20205044 is an apocalyptic number.

It is an amenable number.

20205044 is a deficient number, since it is larger than the sum of its proper divisors (17233840).

20205044 is a wasteful number, since it uses less digits than its factorization.

20205044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297154 (or 297152 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20205044 is about 4495.0021134589. The cubic root of 20205044 is about 272.3662346030.

Adding to 20205044 its reverse (44050202), we get a palindrome (64255246).

The spelling of 20205044 in words is "twenty million, two hundred five thousand, forty-four".