20200002221891 has 2 divisors, whose sum is σ = 20200002221892. Its totient is φ = 20200002221890.

The previous prime is 20200002221857. The next prime is 20200002222007. The reversal of 20200002221891 is 19812220000202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200002221891 - 2¹⁸ = 20200001959747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200002221491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100001110945 + 10100001110946.

It is an arithmetic number, because the mean of its divisors is an integer number (10100001110946).

Almost surely, 2^{20200002221891} is an apocalyptic number.

20200002221891 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200002221891 is an equidigital number, since it uses as much as digits as its factorization.

20200002221891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20200002221891 in words is "twenty trillion, two hundred billion, two million, two hundred twenty-one thousand, eight hundred ninety-one".