18317742243 has 8 divisors (see below), whose sum is σ = 25709112000. Its totient is φ = 11569100328.

The previous prime is 18317742221. The next prime is 18317742251. The reversal of 18317742243 is 34224771381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18317742243 - 2⁸ = 18317741987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18317742195 and 18317742204.

It is not an unprimeable number, because it can be changed into a prime (18317742203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160681893 + ... + 160682006.

It is an arithmetic number, because the mean of its divisors is an integer number (3213639000).

Almost surely, 2^18317742243 is an apocalyptic number.

18317742243 is a deficient number, since it is larger than the sum of its proper divisors (7391369757).

18317742243 is a wasteful number, since it uses less digits than its factorization.

18317742243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321363921.

The product of its digits is 225792, while the sum is 42.

The spelling of 18317742243 in words is "eighteen billion, three hundred seventeen million, seven hundred forty-two thousand, two hundred forty-three".