20759058369821 has 2 divisors, whose sum is σ = 20759058369822. Its totient is φ = 20759058369820.

The previous prime is 20759058369799. The next prime is 20759058369901. The reversal of 20759058369821 is 12896385095702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19636295613796 + 1122762756025 = 4431286^2 + 1059605^2 .

It is a cyclic number.

It is not a de Polignac number, because 20759058369821 - 2⁶ = 20759058369757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20759058362821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10379529184910 + 10379529184911.

It is an arithmetic number, because the mean of its divisors is an integer number (10379529184911).

Almost surely, 2^{20759058369821} is an apocalyptic number.

It is an amenable number.

20759058369821 is a deficient number, since it is larger than the sum of its proper divisors (1).

20759058369821 is an equidigital number, since it uses as much as digits as its factorization.

20759058369821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 65.

The spelling of 20759058369821 in words is "twenty trillion, seven hundred fifty-nine billion, fifty-eight million, three hundred sixty-nine thousand, eight hundred twenty-one".