20352305313421 has 2 divisors, whose sum is σ = 20352305313422. Its totient is φ = 20352305313420.

The previous prime is 20352305313401. The next prime is 20352305313463. The reversal of 20352305313421 is 12431350325302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20332568997225 + 19736316196 = 4509165^2 + 140486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20352305313421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20352305313401) 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, 10176152656710 + 10176152656711.

It is an arithmetic number, because the mean of its divisors is an integer number (10176152656711).

Almost surely, 2^{20352305313421} is an apocalyptic number.

It is an amenable number.

20352305313421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20352305313421 is an equidigital number, since it uses as much as digits as its factorization.

20352305313421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 20352305313421 its reverse (12431350325302), we get a palindrome (32783655638723).

The spelling of 20352305313421 in words is "twenty trillion, three hundred fifty-two billion, three hundred five million, three hundred thirteen thousand, four hundred twenty-one".