20522127281 has 2 divisors, whose sum is σ = 20522127282. Its totient is φ = 20522127280.

The previous prime is 20522127233. The next prime is 20522127289. The reversal of 20522127281 is 18272122502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17767557025 + 2754570256 = 133295^2 + 52484^2 .

It is a cyclic number.

It is not a de Polignac number, because 20522127281 - 2²⁶ = 20455018417 is a prime.

It is a super-2 number, since 2×20522127281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20522127289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261063640 + 10261063641.

It is an arithmetic number, because the mean of its divisors is an integer number (10261063641).

Almost surely, 2^20522127281 is an apocalyptic number.

It is an amenable number.

20522127281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20522127281 is an equidigital number, since it uses as much as digits as its factorization.

20522127281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

Adding to 20522127281 its reverse (18272122502), we get a palindrome (38794249783).

The spelling of 20522127281 in words is "twenty billion, five hundred twenty-two million, one hundred twenty-seven thousand, two hundred eighty-one".