1830138931991 has 2 divisors, whose sum is σ = 1830138931992. Its totient is φ = 1830138931990.

The previous prime is 1830138931963. The next prime is 1830138932003. The reversal of 1830138931991 is 1991398310381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1830138931991 - 2³⁸ = 1555261025047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1830138931931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915069465995 + 915069465996.

It is an arithmetic number, because the mean of its divisors is an integer number (915069465996).

Almost surely, 2^{1830138931991} is an apocalyptic number.

1830138931991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1830138931991 is an equidigital number, since it uses as much as digits as its factorization.

1830138931991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The spelling of 1830138931991 in words is "one trillion, eight hundred thirty billion, one hundred thirty-eight million, nine hundred thirty-one thousand, nine hundred ninety-one".