20704080750281 has 2 divisors, whose sum is σ = 20704080750282. Its totient is φ = 20704080750280.

The previous prime is 20704080750257. The next prime is 20704080750289. The reversal of 20704080750281 is 18205708040702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20635750790281 + 68329960000 = 4542659^2 + 261400^2 .

It is a cyclic number.

It is not a de Polignac number, because 20704080750281 - 2³⁸ = 20429202843337 is a prime.

It is a super-2 number, since 2×20704080750281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20704080750289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352040375140 + 10352040375141.

It is an arithmetic number, because the mean of its divisors is an integer number (10352040375141).

Almost surely, 2^{20704080750281} is an apocalyptic number.

It is an amenable number.

20704080750281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20704080750281 is an equidigital number, since it uses as much as digits as its factorization.

20704080750281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 44.

Adding to 20704080750281 its reverse (18205708040702), we get a palindrome (38909788790983).

The spelling of 20704080750281 in words is "twenty trillion, seven hundred four billion, eighty million, seven hundred fifty thousand, two hundred eighty-one".