22009844 has 6 divisors (see below), whose sum is σ = 38517234. Its totient is φ = 11004920.

The previous prime is 22009831. The next prime is 22009853. The reversal of 22009844 is 44890022.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 4787344 = 4150^2 + 2188^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751227 + ... + 2751234.

It is an arithmetic number, because the mean of its divisors is an integer number (6419539).

Almost surely, 2^22009844 is an apocalyptic number.

It is an amenable number.

22009844 is a deficient number, since it is larger than the sum of its proper divisors (16507390).

22009844 is a wasteful number, since it uses less digits than its factorization.

22009844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5502465 (or 5502463 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 22009844 is about 4691.4650163888. The cubic root of 22009844 is about 280.2457196748.

Adding to 22009844 its reverse (44890022), we get a palindrome (66899866).

The spelling of 22009844 in words is "twenty-two million, nine thousand, eight hundred forty-four".