20555315114287 has 2 divisors, whose sum is σ = 20555315114288. Its totient is φ = 20555315114286.

The previous prime is 20555315114231. The next prime is 20555315114297. The reversal of 20555315114287 is 78241151355502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20555315114287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20555315114287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20555315114297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277657557143 + 10277657557144.

It is an arithmetic number, because the mean of its divisors is an integer number (10277657557144).

Almost surely, 2^{20555315114287} is an apocalyptic number.

20555315114287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20555315114287 is an equidigital number, since it uses as much as digits as its factorization.

20555315114287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680000, while the sum is 49.

Adding to 20555315114287 its reverse (78241151355502), we get a palindrome (98796466469789).

The spelling of 20555315114287 in words is "twenty trillion, five hundred fifty-five billion, three hundred fifteen million, one hundred fourteen thousand, two hundred eighty-seven".