20244512045521 has 2 divisors, whose sum is σ = 20244512045522. Its totient is φ = 20244512045520.

The previous prime is 20244512045503. The next prime is 20244512045543. The reversal of 20244512045521 is 12554021544202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18932628154896 + 1311883890625 = 4351164^2 + 1145375^2 .

It is a cyclic number.

It is not a de Polignac number, because 20244512045521 - 2¹⁷ = 20244511914449 is a prime.

It is a super-3 number, since 3×20244512045521³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20244512045501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122256022760 + 10122256022761.

It is an arithmetic number, because the mean of its divisors is an integer number (10122256022761).

Almost surely, 2^{20244512045521} is an apocalyptic number.

It is an amenable number.

20244512045521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244512045521 is an equidigital number, since it uses as much as digits as its factorization.

20244512045521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128000, while the sum is 37.

Adding to 20244512045521 its reverse (12554021544202), we get a palindrome (32798533589723).

The spelling of 20244512045521 in words is "twenty trillion, two hundred forty-four billion, five hundred twelve million, forty-five thousand, five hundred twenty-one".