22021822 has 8 divisors (see below), whose sum is σ = 33062400. Its totient is φ = 11001024.

The previous prime is 22021819. The next prime is 22021823. The reversal of 22021822 is 22812022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22021822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747 + ... + 6862.

It is an arithmetic number, because the mean of its divisors is an integer number (4132800).

Almost surely, 2^22021822 is an apocalyptic number.

22021822 is a deficient number, since it is larger than the sum of its proper divisors (11040578).

22021822 is a wasteful number, since it uses less digits than its factorization.

22021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9890.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 22021822 is about 4692.7414162726. The cubic root of 22021822 is about 280.2965480599.

Subtracting from 22021822 its product of nonzero digits (256), we obtain a triangular number (22021566 = T₆₆₃₆).

Adding to 22021822 its reverse (22812022), we get a palindrome (44833844).

The spelling of 22021822 in words is "twenty-two million, twenty-one thousand, eight hundred twenty-two".