2002000191809 has 2 divisors, whose sum is σ = 2002000191810. Its totient is φ = 2002000191808.

The previous prime is 2002000191773. The next prime is 2002000191847. The reversal of 2002000191809 is 9081910002002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1859364052225 + 142636139584 = 1363585^2 + 377672^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002000191809 - 2¹² = 2002000187713 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002000191209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001000095904 + 1001000095905.

It is an arithmetic number, because the mean of its divisors is an integer number (1001000095905).

Almost surely, 2^{2002000191809} is an apocalyptic number.

It is an amenable number.

2002000191809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002000191809 is an equidigital number, since it uses as much as digits as its factorization.

2002000191809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 2002000191809 in words is "two trillion, two billion, one hundred ninety-one thousand, eight hundred nine".