20823005062081 has 2 divisors, whose sum is σ = 20823005062082. Its totient is φ = 20823005062080.

The previous prime is 20823005062031. The next prime is 20823005062099. The reversal of 20823005062081 is 18026050032802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12191654639025 + 8631350423056 = 3491655^2 + 2937916^2 .

It is a cyclic number.

It is not a de Polignac number, because 20823005062081 - 2²⁵ = 20822971507649 is a prime.

It is a super-2 number, since 2×20823005062081² (a number of 27 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 20823005062081.

It is not a weakly prime, because it can be changed into another prime (20823005062031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411502531040 + 10411502531041.

It is an arithmetic number, because the mean of its divisors is an integer number (10411502531041).

Almost surely, 2^{20823005062081} is an apocalyptic number.

It is an amenable number.

20823005062081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20823005062081 is an equidigital number, since it uses as much as digits as its factorization.

20823005062081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 37.

Adding to 20823005062081 its reverse (18026050032802), we get a palindrome (38849055094883).

The spelling of 20823005062081 in words is "twenty trillion, eight hundred twenty-three billion, five million, sixty-two thousand, eighty-one".