20352320505449 has 2 divisors, whose sum is σ = 20352320505450. Its totient is φ = 20352320505448.

The previous prime is 20352320505401. The next prime is 20352320505571. The reversal of 20352320505449 is 94450502325302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12935783323225 + 7416537182224 = 3596635^2 + 2723332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20352320505449 is a prime.

It is not a weakly prime, because it can be changed into another prime (20352320504449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176160252724 + 10176160252725.

It is an arithmetic number, because the mean of its divisors is an integer number (10176160252725).

Almost surely, 2^{20352320505449} is an apocalyptic number.

It is an amenable number.

20352320505449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20352320505449 is an equidigital number, since it uses as much as digits as its factorization.

20352320505449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 20352320505449 in words is "twenty trillion, three hundred fifty-two billion, three hundred twenty million, five hundred five thousand, four hundred forty-nine".