22120144 has 20 divisors (see below), whose sum is σ = 42988320. Its totient is φ = 11026400.

The previous prime is 22120099. The next prime is 22120151. The reversal of 22120144 is 44102122.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 3819 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (2149416).

Almost surely, 2^22120144 is an apocalyptic number.

It is an amenable number.

22120144 is a deficient number, since it is larger than the sum of its proper divisors (20868176).

22120144 is a wasteful number, since it uses less digits than its factorization.

22120144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218 (or 4212 counting only the distinct ones).

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

The square root of 22120144 is about 4703.2057152542. The cubic root of 22120144 is about 280.7130804045.

Adding to 22120144 its reverse (44102122), we get a palindrome (66222266).

The spelling of 22120144 in words is "twenty-two million, one hundred twenty thousand, one hundred forty-four".