2021703351643 has 2 divisors, whose sum is σ = 2021703351644. Its totient is φ = 2021703351642.

The previous prime is 2021703351641. The next prime is 2021703351739. The reversal of 2021703351643 is 3461533071202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021703351643 - 2¹ = 2021703351641 is a prime.

Together with 2021703351641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2021703351641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010851675821 + 1010851675822.

It is an arithmetic number, because the mean of its divisors is an integer number (1010851675822).

Almost surely, 2^{2021703351643} is an apocalyptic number.

2021703351643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021703351643 is an equidigital number, since it uses as much as digits as its factorization.

2021703351643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 2021703351643 in words is "two trillion, twenty-one billion, seven hundred three million, three hundred fifty-one thousand, six hundred forty-three".