20286223 has 2 divisors, whose sum is σ = 20286224. Its totient is φ = 20286222.

The previous prime is 20286199. The next prime is 20286229. The reversal of 20286223 is 32268202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20286223 - 2¹³ = 20278031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20286229) 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, 10143111 + 10143112.

It is an arithmetic number, because the mean of its divisors is an integer number (10143112).

Almost surely, 2^20286223 is an apocalyptic number.

20286223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20286223 is an equidigital number, since it uses as much as digits as its factorization.

20286223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20286223 is about 4504.0229795151. The cubic root of 20286223 is about 272.7305144834.

The spelling of 20286223 in words is "twenty million, two hundred eighty-six thousand, two hundred twenty-three".