20554120314281 has 2 divisors, whose sum is σ = 20554120314282. Its totient is φ = 20554120314280.

The previous prime is 20554120314269. The next prime is 20554120314317. The reversal of 20554120314281 is 18241302145502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16916933520400 + 3637186793881 = 4113020^2 + 1907141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554120314281 is a prime.

It is a super-2 number, since 2×20554120314281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20554120319281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277060157140 + 10277060157141.

It is an arithmetic number, because the mean of its divisors is an integer number (10277060157141).

Almost surely, 2^{20554120314281} is an apocalyptic number.

It is an amenable number.

20554120314281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554120314281 is an equidigital number, since it uses as much as digits as its factorization.

20554120314281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 38.

Adding to 20554120314281 its reverse (18241302145502), we get a palindrome (38795422459783).

The spelling of 20554120314281 in words is "twenty trillion, five hundred fifty-four billion, one hundred twenty million, three hundred fourteen thousand, two hundred eighty-one".