2118640268 has 12 divisors (see below), whose sum is σ = 3731236992. Its totient is φ = 1052572560.

The previous prime is 2118640261. The next prime is 2118640357. The reversal of 2118640268 is 8620468112.

It is a happy number.

It is a super-2 number, since 2×2118640268² = 8977273170382223648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2118640261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686188 + ... + 1687443.

It is an arithmetic number, because the mean of its divisors is an integer number (310936416).

Almost surely, 2^2118640268 is an apocalyptic number.

It is an amenable number.

2118640268 is a deficient number, since it is larger than the sum of its proper divisors (1612596724).

2118640268 is a wasteful number, since it uses less digits than its factorization.

2118640268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373792 (or 3373790 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 2118640268 is about 46028.6896185412. The cubic root of 2118640268 is about 1284.3569519967.

The spelling of 2118640268 in words is "two billion, one hundred eighteen million, six hundred forty thousand, two hundred sixty-eight".