22868821 has 2 divisors, whose sum is σ = 22868822. Its totient is φ = 22868820.

The previous prime is 22868809. The next prime is 22868863. The reversal of 22868821 is 12886822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 5354596 = 4185^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 22868821 - 2¹¹ = 22866773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22868891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11434410 + 11434411.

It is an arithmetic number, because the mean of its divisors is an integer number (11434411).

Almost surely, 2^22868821 is an apocalyptic number.

It is an amenable number.

22868821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22868821 is an equidigital number, since it uses as much as digits as its factorization.

22868821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 37.

The square root of 22868821 is about 4782.1356107915. The cubic root of 22868821 is about 283.8450065139.

The spelling of 22868821 in words is "twenty-two million, eight hundred sixty-eight thousand, eight hundred twenty-one".