22168021 has 8 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 21119472.

The previous prime is 22167997. The next prime is 22168037. The reversal of 22168021 is 12086122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22168021 - 2⁵ = 22167989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22167983 and 22168001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22168061) 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 7 ways as a sum of consecutive naturals, for example, 4396 + ... + 7978.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^22168021 is an apocalyptic number.

It is an amenable number.

22168021 is a deficient number, since it is larger than the sum of its proper divisors (1056299).

22168021 is a wasteful number, since it uses less digits than its factorization.

22168021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 22168021 is about 4708.2927903859. The cubic root of 22168021 is about 280.9154602724.

The spelling of 22168021 in words is "twenty-two million, one hundred sixty-eight thousand, twenty-one".