22220636 has 12 divisors (see below), whose sum is σ = 38979360. Its totient is φ = 11083680.

The previous prime is 22220629. The next prime is 22220651. The reversal of 22220636 is 63602222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4721 + ... + 8168.

It is an arithmetic number, because the mean of its divisors is an integer number (3248280).

Almost surely, 2^22220636 is an apocalyptic number.

It is an amenable number.

22220636 is a deficient number, since it is larger than the sum of its proper divisors (16758724).

22220636 is a wasteful number, since it uses less digits than its factorization.

22220636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13324 (or 13322 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 22220636 is about 4713.8769606344. The cubic root of 22220636 is about 281.1375322499.

Adding to 22220636 its reverse (63602222), we get a palindrome (85822858).

The spelling of 22220636 in words is "twenty-two million, two hundred twenty thousand, six hundred thirty-six".