22012356 has 48 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 6944160.

The previous prime is 22012349. The next prime is 22012379. The reversal of 22012356 is 65321022.

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 15 ways as a sum of consecutive naturals, for example, 16855 + ... + 18113.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^22012356 is an apocalyptic number.

It is an amenable number.

22012356 is an abundant number, since it is smaller than the sum of its proper divisors (32177724).

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

22012356 is a wasteful number, since it uses less digits than its factorization.

22012356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22012356 is about 4691.7327289606. The cubic root of 22012356 is about 280.2563808206.

Adding to 22012356 its reverse (65321022), we get a palindrome (87333378).

The spelling of 22012356 in words is "twenty-two million, twelve thousand, three hundred fifty-six".