20942841085343 has 2 divisors, whose sum is σ = 20942841085344. Its totient is φ = 20942841085342.

The previous prime is 20942841085337. The next prime is 20942841085351. The reversal of 20942841085343 is 34358014824902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20942841085343 - 2⁶ = 20942841085279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20942841084343) 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, 10471420542671 + 10471420542672.

It is an arithmetic number, because the mean of its divisors is an integer number (10471420542672).

Almost surely, 2^{20942841085343} is an apocalyptic number.

20942841085343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20942841085343 is an equidigital number, since it uses as much as digits as its factorization.

20942841085343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 20942841085343 in words is "twenty trillion, nine hundred forty-two billion, eight hundred forty-one million, eighty-five thousand, three hundred forty-three".