22018223 has 2 divisors, whose sum is σ = 22018224. Its totient is φ = 22018222.

The previous prime is 22018211. The next prime is 22018237. The reversal of 22018223 is 32281022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22018223 - 2¹⁰ = 22017199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22018195 and 22018204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22018123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009111 + 11009112.

It is an arithmetic number, because the mean of its divisors is an integer number (11009112).

Almost surely, 2^22018223 is an apocalyptic number.

22018223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22018223 is an equidigital number, since it uses as much as digits as its factorization.

22018223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22018223 is about 4692.3579360488. The cubic root of 22018223 is about 280.2812777183.

Adding to 22018223 its reverse (32281022), we get a palindrome (54299245).

The spelling of 22018223 in words is "twenty-two million, eighteen thousand, two hundred twenty-three".