10189931891 has 4 divisors (see below), whose sum is σ = 10632972432. Its totient is φ = 9746891352.

The previous prime is 10189931887. The next prime is 10189931893. The reversal of 10189931891 is 19813998101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10189931891 - 2² = 10189931887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10189931893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221520236 + ... + 221520281.

It is an arithmetic number, because the mean of its divisors is an integer number (2658243108).

Almost surely, 2^10189931891 is an apocalyptic number.

10189931891 is a deficient number, since it is larger than the sum of its proper divisors (443040541).

10189931891 is an equidigital number, since it uses as much as digits as its factorization.

10189931891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443040540.

The product of its (nonzero) digits is 139968, while the sum is 50.

The spelling of 10189931891 in words is "ten billion, one hundred eighty-nine million, nine hundred thirty-one thousand, eight hundred ninety-one".