20563220267 has 2 divisors, whose sum is σ = 20563220268. Its totient is φ = 20563220266.

The previous prime is 20563220243. The next prime is 20563220287. The reversal of 20563220267 is 76202236502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20563220267 - 2²⁶ = 20496111403 is a prime.

It is not a weakly prime, because it can be changed into another prime (20563220287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281610133 + 10281610134.

It is an arithmetic number, because the mean of its divisors is an integer number (10281610134).

Almost surely, 2^20563220267 is an apocalyptic number.

20563220267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563220267 is an equidigital number, since it uses as much as digits as its factorization.

20563220267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 35.

Adding to 20563220267 its reverse (76202236502), we get a palindrome (96765456769).

The spelling of 20563220267 in words is "twenty billion, five hundred sixty-three million, two hundred twenty thousand, two hundred sixty-seven".