22021144 has 16 divisors (see below), whose sum is σ = 41362200. Its totient is φ = 10991232.

The previous prime is 22021123. The next prime is 22021151. The reversal of 22021144 is 44112022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3184 + ... + 7360.

Almost surely, 2^22021144 is an apocalyptic number.

It is an amenable number.

22021144 is a deficient number, since it is larger than the sum of its proper divisors (19341056).

22021144 is a wasteful number, since it uses less digits than its factorization.

22021144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842 (or 4838 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 22021144 is about 4692.6691764922. The cubic root of 22021144 is about 280.2936714737.

Adding to 22021144 its reverse (44112022), we get a palindrome (66133166).

The spelling of 22021144 in words is "twenty-two million, twenty-one thousand, one hundred forty-four".