20511350322241 has 2 divisors, whose sum is σ = 20511350322242. Its totient is φ = 20511350322240.

The previous prime is 20511350322227. The next prime is 20511350322293. The reversal of 20511350322241 is 14222305311502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15813315747216 + 4698034575025 = 3976596^2 + 2167495^2 .

It is a cyclic number.

It is not a de Polignac number, because 20511350322241 - 2⁹ = 20511350321729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20511350322041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255675161120 + 10255675161121.

It is an arithmetic number, because the mean of its divisors is an integer number (10255675161121).

Almost surely, 2^{20511350322241} is an apocalyptic number.

It is an amenable number.

20511350322241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20511350322241 is an equidigital number, since it uses as much as digits as its factorization.

20511350322241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 20511350322241 its reverse (14222305311502), we get a palindrome (34733655633743).

The spelling of 20511350322241 in words is "twenty trillion, five hundred eleven billion, three hundred fifty million, three hundred twenty-two thousand, two hundred forty-one".