2118343385 has 4 divisors (see below), whose sum is σ = 2542012068. Its totient is φ = 1694674704.

The previous prime is 2118343321. The next prime is 2118343391. The reversal of 2118343385 is 5833438112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487879744 + 1630463641 = 22088^2 + 40379^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118343385 - 2⁶ = 2118343321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211834334 + ... + 211834343.

It is an arithmetic number, because the mean of its divisors is an integer number (635503017).

Almost surely, 2^2118343385 is an apocalyptic number.

It is an amenable number.

2118343385 is a deficient number, since it is larger than the sum of its proper divisors (423668683).

2118343385 is an equidigital number, since it uses as much as digits as its factorization.

2118343385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423668682.

The product of its digits is 69120, while the sum is 38.

The square root of 2118343385 is about 46025.4645278024. The cubic root of 2118343385 is about 1284.2969572974.

The spelling of 2118343385 in words is "two billion, one hundred eighteen million, three hundred forty-three thousand, three hundred eighty-five".