20210020984843 has 2 divisors, whose sum is σ = 20210020984844. Its totient is φ = 20210020984842.

The previous prime is 20210020984837. The next prime is 20210020984847. The reversal of 20210020984843 is 34848902001202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210020984843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210020984843.

It is not a weakly prime, because it can be changed into another prime (20210020984847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105010492421 + 10105010492422.

It is an arithmetic number, because the mean of its divisors is an integer number (10105010492422).

Almost surely, 2^{20210020984843} is an apocalyptic number.

20210020984843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210020984843 is an equidigital number, since it uses as much as digits as its factorization.

20210020984843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 20210020984843 in words is "twenty trillion, two hundred ten billion, twenty million, nine hundred eighty-four thousand, eight hundred forty-three".