22020664 has 16 divisors (see below), whose sum is σ = 42621120. Its totient is φ = 10655040.

The previous prime is 22020659. The next prime is 22020667. The reversal of 22020664 is 46602022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44149 + ... + 44644.

It is an arithmetic number, because the mean of its divisors is an integer number (2663820).

Almost surely, 2^22020664 is an apocalyptic number.

It is an amenable number.

22020664 is a deficient number, since it is larger than the sum of its proper divisors (20600456).

22020664 is a wasteful number, since it uses less digits than its factorization.

22020664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88830 (or 88826 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 22020664 is about 4692.6180326125. The cubic root of 22020664 is about 280.2916349167.

Adding to 22020664 its reverse (46602022), we get a palindrome (68622686).

The spelling of 22020664 in words is "twenty-two million, twenty thousand, six hundred sixty-four".