2118081916 has 12 divisors (see below), whose sum is σ = 3708952632. Its totient is φ = 1058381168.

The previous prime is 2118081907. The next prime is 2118081919. The reversal of 2118081916 is 6191808112.

It is a super-3 number, since 3×2118081916³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118081919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157690 + ... + 170593.

It is an arithmetic number, because the mean of its divisors is an integer number (309079386).

Almost surely, 2^2118081916 is an apocalyptic number.

It is an amenable number.

2118081916 is a deficient number, since it is larger than the sum of its proper divisors (1590870716).

2118081916 is a wasteful number, since it uses less digits than its factorization.

2118081916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329900 (or 329898 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 37.

The square root of 2118081916 is about 46022.6239582230. The cubic root of 2118081916 is about 1284.2441144863.

The spelling of 2118081916 in words is "two billion, one hundred eighteen million, eighty-one thousand, nine hundred sixteen".