10320191891 has 2 divisors, whose sum is σ = 10320191892. Its totient is φ = 10320191890.

The previous prime is 10320191881. The next prime is 10320191929. The reversal of 10320191891 is 19819102301.

It is a weak prime.

It is an emirp because it is prime and its reverse (19819102301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10320191891 - 2³⁰ = 9246450067 is a prime.

It is not a weakly prime, because it can be changed into another prime (10320191881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5160095945 + 5160095946.

It is an arithmetic number, because the mean of its divisors is an integer number (5160095946).

Almost surely, 2^10320191891 is an apocalyptic number.

10320191891 is a deficient number, since it is larger than the sum of its proper divisors (1).

10320191891 is an equidigital number, since it uses as much as digits as its factorization.

10320191891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 10320191891 in words is "ten billion, three hundred twenty million, one hundred ninety-one thousand, eight hundred ninety-one".