20521054241 has 2 divisors, whose sum is σ = 20521054242. Its totient is φ = 20521054240.

The previous prime is 20521054223. The next prime is 20521054271. The reversal of 20521054241 is 14245012502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14573559841 + 5947494400 = 120721^2 + 77120^2 .

It is a cyclic number.

It is not a de Polignac number, because 20521054241 - 2¹⁴ = 20521037857 is a prime.

It is a super-2 number, since 2×20521054241² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20521054241.

It is not a weakly prime, because it can be changed into another prime (20521054201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260527120 + 10260527121.

It is an arithmetic number, because the mean of its divisors is an integer number (10260527121).

Almost surely, 2^20521054241 is an apocalyptic number.

It is an amenable number.

20521054241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20521054241 is an equidigital number, since it uses as much as digits as its factorization.

20521054241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 20521054241 its reverse (14245012502), we get a palindrome (34766066743).

The spelling of 20521054241 in words is "twenty billion, five hundred twenty-one million, fifty-four thousand, two hundred forty-one".