2118342186 has 64 divisors (see below), whose sum is σ = 4964457600. Its totient is φ = 667699200.

The previous prime is 2118342173. The next prime is 2118342199. The reversal of 2118342186 is 6812438112.

It is an interprime number because it is at equal distance from previous prime (2118342173) and next prime (2118342199).

It is a self number, because there is not a number n which added to its sum of digits gives 2118342186.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656056 + ... + 659276.

It is an arithmetic number, because the mean of its divisors is an integer number (77569650).

Almost surely, 2^2118342186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118342186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482228800).

2118342186 is an abundant number, since it is smaller than the sum of its proper divisors (2846115414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2118342186 is a wasteful number, since it uses less digits than its factorization.

2118342186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892 (or 3886 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2118342186 is about 46025.4515024025. The cubic root of 2118342186 is about 1284.2967149898.

The spelling of 2118342186 in words is "two billion, one hundred eighteen million, three hundred forty-two thousand, one hundred eighty-six".