22681356 has 12 divisors (see below), whose sum is σ = 52923192. Its totient is φ = 7560448.

The previous prime is 22681343. The next prime is 22681357. The reversal of 22681356 is 65318622.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (22681357) 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, 945045 + ... + 945068.

It is an arithmetic number, because the mean of its divisors is an integer number (4410266).

Almost surely, 2^22681356 is an apocalyptic number.

It is an amenable number.

22681356 is an abundant number, since it is smaller than the sum of its proper divisors (30241836).

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

22681356 is a wasteful number, since it uses less digits than its factorization.

22681356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890120 (or 1890118 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 22681356 is about 4762.4947244065. The cubic root of 22681356 is about 283.0672799703.

Adding to 22681356 its reverse (65318622), we get a palindrome (87999978).

The spelling of 22681356 in words is "twenty-two million, six hundred eighty-one thousand, three hundred fifty-six".