20351644206143 has 2 divisors, whose sum is σ = 20351644206144. Its totient is φ = 20351644206142.

The previous prime is 20351644206139. The next prime is 20351644206151. The reversal of 20351644206143 is 34160244615302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20351644206143 - 2² = 20351644206139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20351644206143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20351644206343) 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, 10175822103071 + 10175822103072.

It is an arithmetic number, because the mean of its divisors is an integer number (10175822103072).

Almost surely, 2^{20351644206143} is an apocalyptic number.

20351644206143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20351644206143 is an equidigital number, since it uses as much as digits as its factorization.

20351644206143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20351644206143 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-four million, two hundred six thousand, one hundred forty-three".