22386821 has 2 divisors, whose sum is σ = 22386822. Its totient is φ = 22386820.

The previous prime is 22386809. The next prime is 22386839. The reversal of 22386821 is 12868322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 8473921 = 3730^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22386821 - 2⁶ = 22386757 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 (22386421) 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 as a sum of consecutive naturals, namely, 11193410 + 11193411.

It is an arithmetic number, because the mean of its divisors is an integer number (11193411).

Almost surely, 2^22386821 is an apocalyptic number.

It is an amenable number.

22386821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22386821 is an equidigital number, since it uses as much as digits as its factorization.

22386821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 22386821 is about 4731.4713356418. The cubic root of 22386821 is about 281.8366548954.

The spelling of 22386821 in words is "twenty-two million, three hundred eighty-six thousand, eight hundred twenty-one".