20009044 has 18 divisors (see below), whose sum is σ = 38489402. Its totient is φ = 9094800.

The previous prime is 20009029. The next prime is 20009047. The reversal of 20009044 is 44090002.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 5856400 = 3762^2 + 2420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20187 + ... + 21154.

Almost surely, 2^20009044 is an apocalyptic number.

It is an amenable number.

20009044 is a deficient number, since it is larger than the sum of its proper divisors (18480358).

20009044 is a wasteful number, since it uses less digits than its factorization.

20009044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41367 (or 41354 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20009044 is about 4473.1469906543. The cubic root of 20009044 is about 271.4826708153.

Adding to 20009044 its reverse (44090002), we get a palindrome (64099046).

The spelling of 20009044 in words is "twenty million, nine thousand, forty-four".