20440244 has 48 divisors (see below), whose sum is σ = 41065920. Its totient is φ = 8816640.

The previous prime is 20440213. The next prime is 20440249. The reversal of 20440244 is 44204402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105812 + ... + 106004.

It is an arithmetic number, because the mean of its divisors is an integer number (855540).

Almost surely, 2^20440244 is an apocalyptic number.

It is an amenable number.

20440244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20440244 is a wasteful number, since it uses less digits than its factorization.

20440244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 20440244 is about 4521.0888069137. The cubic root of 20440244 is about 273.4190008426.

Adding to 20440244 its reverse (44204402), we get a palindrome (64644646).

The spelling of 20440244 in words is "twenty million, four hundred forty thousand, two hundred forty-four".