22001044 has 12 divisors (see below), whose sum is σ = 41463604. Its totient is φ = 10154304.

The previous prime is 22001033. The next prime is 22001047. The reversal of 22001044 is 44010022.

It can be written as a sum of positive squares in 2 ways, for example, as 5904900 + 16096144 = 2430^2 + 4012^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211497 + ... + 211600.

Almost surely, 2^22001044 is an apocalyptic number.

It is an amenable number.

22001044 is a deficient number, since it is larger than the sum of its proper divisors (19462560).

22001044 is a wasteful number, since it uses less digits than its factorization.

22001044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423114 (or 423112 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22001044 is about 4690.5270492771. The cubic root of 22001044 is about 280.2083653122.

Adding to 22001044 its reverse (44010022), we get a palindrome (66011066).

The spelling of 22001044 in words is "twenty-two million, one thousand, forty-four".