1830138931931 has 2 divisors, whose sum is σ = 1830138931932. Its totient is φ = 1830138931930.

The previous prime is 1830138931919. The next prime is 1830138931937. The reversal of 1830138931931 is 1391398310381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1830138931931 - 2¹⁸ = 1830138669787 is a prime.

It is a super-2 number, since 2×1830138931931² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1830138931931.

It is not a weakly prime, because it can be changed into another prime (1830138931937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915069465965 + 915069465966.

It is an arithmetic number, because the mean of its divisors is an integer number (915069465966).

Almost surely, 2^{1830138931931} is an apocalyptic number.

1830138931931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1830138931931 is an equidigital number, since it uses as much as digits as its factorization.

1830138931931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 1830138931931 in words is "one trillion, eight hundred thirty billion, one hundred thirty-eight million, nine hundred thirty-one thousand, nine hundred thirty-one".