22720636 has 12 divisors (see below), whose sum is σ = 42100128. Its totient is φ = 10692032.

The previous prime is 22720631. The next prime is 22720673. The reversal of 22720636 is 63602722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720631) by changing a digit.

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, 166996 + ... + 167131.

It is an arithmetic number, because the mean of its divisors is an integer number (3508344).

Almost surely, 2^22720636 is an apocalyptic number.

It is an amenable number.

22720636 is a deficient number, since it is larger than the sum of its proper divisors (19379492).

22720636 is a wasteful number, since it uses less digits than its factorization.

22720636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334148 (or 334146 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 22720636 is about 4766.6168295763. The cubic root of 22720636 is about 283.2305928148.

The spelling of 22720636 in words is "twenty-two million, seven hundred twenty thousand, six hundred thirty-six".