22120816 has 10 divisors (see below), whose sum is σ = 42859112. Its totient is φ = 11060400.

The previous prime is 22120801. The next prime is 22120841. The reversal of 22120816 is 61802122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691260 + ... + 691291.

Almost surely, 2^22120816 is an apocalyptic number.

It is an amenable number.

22120816 is a deficient number, since it is larger than the sum of its proper divisors (20738296).

22120816 is a wasteful number, since it uses less digits than its factorization.

22120816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382559 (or 1382553 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 22120816 is about 4703.2771553460. The cubic root of 22120816 is about 280.7159230213.

Adding to 22120816 its reverse (61802122), we get a palindrome (83922938).

The spelling of 22120816 in words is "twenty-two million, one hundred twenty thousand, eight hundred sixteen".