20411246281 has 2 divisors, whose sum is σ = 20411246282. Its totient is φ = 20411246280.

The previous prime is 20411246279. The next prime is 20411246309. The reversal of 20411246281 is 18264211402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15610003600 + 4801242681 = 124940^2 + 69291^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411246281 - 2¹ = 20411246279 is a prime.

It is a super-2 number, since 2×20411246281² (a number of 21 digits) contains 22 as substring.

Together with 20411246279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20411246221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205623140 + 10205623141.

It is an arithmetic number, because the mean of its divisors is an integer number (10205623141).

Almost surely, 2^20411246281 is an apocalyptic number.

It is an amenable number.

20411246281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411246281 is an equidigital number, since it uses as much as digits as its factorization.

20411246281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 31.

Adding to 20411246281 its reverse (18264211402), we get a palindrome (38675457683).

The spelling of 20411246281 in words is "twenty billion, four hundred eleven million, two hundred forty-six thousand, two hundred eighty-one".