22020636 has 24 divisors (see below), whose sum is σ = 56052864. Its totient is φ = 6672880.

The previous prime is 22020631. The next prime is 22020643. The reversal of 22020636 is 63602022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020631) 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 7 ways as a sum of consecutive naturals, for example, 83280 + ... + 83543.

It is an arithmetic number, because the mean of its divisors is an integer number (2335536).

Almost surely, 2^22020636 is an apocalyptic number.

It is an amenable number.

22020636 is an abundant number, since it is smaller than the sum of its proper divisors (34032228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22020636 is a wasteful number, since it uses less digits than its factorization.

22020636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166841 (or 166839 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 22020636 is about 4692.6150492023. The cubic root of 22020636 is about 280.2915161167.

Adding to 22020636 its reverse (63602022), we get a palindrome (85622658).

The spelling of 22020636 in words is "twenty-two million, twenty thousand, six hundred thirty-six".