23181811943 has 2 divisors, whose sum is σ = 23181811944. Its totient is φ = 23181811942.

The previous prime is 23181811901. The next prime is 23181811969. The reversal of 23181811943 is 34911818132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23181811943 - 2¹⁰ = 23181810919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23181811943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23181816943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11590905971 + 11590905972.

It is an arithmetic number, because the mean of its divisors is an integer number (11590905972).

Almost surely, 2^23181811943 is an apocalyptic number.

23181811943 is a deficient number, since it is larger than the sum of its proper divisors (1).

23181811943 is an equidigital number, since it uses as much as digits as its factorization.

23181811943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The spelling of 23181811943 in words is "twenty-three billion, one hundred eighty-one million, eight hundred eleven thousand, nine hundred forty-three".