20500223 has 2 divisors, whose sum is σ = 20500224. Its totient is φ = 20500222.

The previous prime is 20500219. The next prime is 20500229. The reversal of 20500223 is 32200502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20500223 - 2² = 20500219 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20500198 and 20500207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20500229) 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, 10250111 + 10250112.

It is an arithmetic number, because the mean of its divisors is an integer number (10250112).

Almost surely, 2^20500223 is an apocalyptic number.

20500223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500223 is an equidigital number, since it uses as much as digits as its factorization.

20500223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20500223 is about 4527.7171952321. The cubic root of 20500223 is about 273.6861761232.

Adding to 20500223 its reverse (32200502), we get a palindrome (52700725).

The spelling of 20500223 in words is "twenty million, five hundred thousand, two hundred twenty-three".