20544244 has 72 divisors (see below), whose sum is σ = 45832640. Its totient is φ = 7869312.

The previous prime is 20544241. The next prime is 20544253. The reversal of 20544244 is 44244502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281392 + ... + 281464.

Almost surely, 2^20544244 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 20544244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22916320).

20544244 is an abundant number, since it is smaller than the sum of its proper divisors (25288396).

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

20544244 is a wasteful number, since it uses less digits than its factorization.

20544244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 20544244 is about 4532.5758680909. The cubic root of 20544244 is about 273.8819353881.

Adding to 20544244 its reverse (44244502), we get a palindrome (64788746).

The spelling of 20544244 in words is "twenty million, five hundred forty-four thousand, two hundred forty-four".