20663461882289 has 2 divisors, whose sum is σ = 20663461882290. Its totient is φ = 20663461882288.

The previous prime is 20663461882253. The next prime is 20663461882307. The reversal of 20663461882289 is 98228816436602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19680802053025 + 982659829264 = 4436305^2 + 991292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20663461882289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20663461885289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10331730941144 + 10331730941145.

It is an arithmetic number, because the mean of its divisors is an integer number (10331730941145).

Almost surely, 2^{20663461882289} is an apocalyptic number.

It is an amenable number.

20663461882289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20663461882289 is an equidigital number, since it uses as much as digits as its factorization.

20663461882289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95551488, while the sum is 65.

The spelling of 20663461882289 in words is "twenty trillion, six hundred sixty-three billion, four hundred sixty-one million, eight hundred eighty-two thousand, two hundred eighty-nine".