18007871943 has 4 divisors (see below), whose sum is σ = 24010495928. Its totient is φ = 12005247960.

The previous prime is 18007871839. The next prime is 18007871953. The reversal of 18007871943 is 34917870081.

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

It is not a de Polignac number, because 18007871943 - 2¹⁸ = 18007609799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18007871892 and 18007871901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18007871953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001311988 + ... + 3001311993.

It is an arithmetic number, because the mean of its divisors is an integer number (6002623982).

Almost surely, 2^18007871943 is an apocalyptic number.

18007871943 is a deficient number, since it is larger than the sum of its proper divisors (6002623985).

18007871943 is an equidigital number, since it uses as much as digits as its factorization.

18007871943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002623984.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 18007871943 in words is "eighteen billion, seven million, eight hundred seventy-one thousand, nine hundred forty-three".