20353040857343 has 2 divisors, whose sum is σ = 20353040857344. Its totient is φ = 20353040857342.

The previous prime is 20353040857241. The next prime is 20353040857351. The reversal of 20353040857343 is 34375804035302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20353040857343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353040857043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176520428671 + 10176520428672.

It is an arithmetic number, because the mean of its divisors is an integer number (10176520428672).

Almost surely, 2^{20353040857343} is an apocalyptic number.

20353040857343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353040857343 is an equidigital number, since it uses as much as digits as its factorization.

20353040857343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 47.

The spelling of 20353040857343 in words is "twenty trillion, three hundred fifty-three billion, forty million, eight hundred fifty-seven thousand, three hundred forty-three".