20711203 has 2 divisors, whose sum is σ = 20711204. Its totient is φ = 20711202.

The previous prime is 20711179. The next prime is 20711221. The reversal of 20711203 is 30211702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20711203 is a prime.

It is not a weakly prime, because it can be changed into another prime (20711233) 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, 10355601 + 10355602.

It is an arithmetic number, because the mean of its divisors is an integer number (10355602).

Almost surely, 2^20711203 is an apocalyptic number.

20711203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20711203 is an equidigital number, since it uses as much as digits as its factorization.

20711203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20711203 is about 4550.9562731364. The cubic root of 20711203 is about 274.6218626516.

Adding to 20711203 its reverse (30211702), we get a palindrome (50922905).

The spelling of 20711203 in words is "twenty million, seven hundred eleven thousand, two hundred three".