20205223 has 2 divisors, whose sum is σ = 20205224. Its totient is φ = 20205222.

The previous prime is 20205193. The next prime is 20205259. The reversal of 20205223 is 32250202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20205223 - 2¹⁷ = 20074151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20205197 and 20205206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20205023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102611 + 10102612.

It is an arithmetic number, because the mean of its divisors is an integer number (10102612).

Almost surely, 2^20205223 is an apocalyptic number.

20205223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20205223 is an equidigital number, since it uses as much as digits as its factorization.

20205223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20205223 is about 4495.0220244177. The cubic root of 20205223 is about 272.3670389139.

Adding to 20205223 its reverse (32250202), we get a palindrome (52455425).

The spelling of 20205223 in words is "twenty million, two hundred five thousand, two hundred twenty-three".