22068 has 18 divisors (see below), whose sum is σ = 55874. Its totient is φ = 7344.

The previous prime is 22067. The next prime is 22073. The reversal of 22068 is 86022.

It can be written as a sum of positive squares in only one way, i.e., 11664 + 10404 = 108^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 22068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22063) 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 5 ways as a sum of consecutive naturals, for example, 271 + ... + 342.

2²²⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

22068 is an abundant number, since it is smaller than the sum of its proper divisors (33806).

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

22068 is a wasteful number, since it uses less digits than its factorization.

22068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22068 is about 148.5530208377. The cubic root of 22068 is about 28.0492331093.

The spelling of 22068 in words is "twenty-two thousand, sixty-eight".