2118617868 has 24 divisors (see below), whose sum is σ = 4979529072. Its totient is φ = 701050624.

The previous prime is 2118617867. The next prime is 2118617909. The reversal of 2118617868 is 8687168112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2118617861) 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, 642705 + ... + 645992.

It is an arithmetic number, because the mean of its divisors is an integer number (207480378).

Almost surely, 2^2118617868 is an apocalyptic number.

It is an amenable number.

2118617868 is an abundant number, since it is smaller than the sum of its proper divisors (2860911204).

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

2118617868 is a wasteful number, since it uses less digits than its factorization.

2118617868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288841 (or 1288839 counting only the distinct ones).

The product of its digits is 258048, while the sum is 48.

The square root of 2118617868 is about 46028.4462913968. The cubic root of 2118617868 is about 1284.3524255562.

The spelling of 2118617868 in words is "two billion, one hundred eighteen million, six hundred seventeen thousand, eight hundred sixty-eight".