2118503311 has 4 divisors (see below), whose sum is σ = 2134675224. Its totient is φ = 2102331400.

The previous prime is 2118503281. The next prime is 2118503323. The reversal of 2118503311 is 1133058112.

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

It is a cyclic number.

It is not a de Polignac number, because 2118503311 - 2¹⁹ = 2117979023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118503111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8085760 + ... + 8086021.

It is an arithmetic number, because the mean of its divisors is an integer number (533668806).

Almost surely, 2^2118503311 is an apocalyptic number.

2118503311 is a deficient number, since it is larger than the sum of its proper divisors (16171913).

2118503311 is a wasteful number, since it uses less digits than its factorization.

2118503311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16171912.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2118503311 is about 46027.2018593353. The cubic root of 2118503311 is about 1284.3292761538.

The spelling of 2118503311 in words is "two billion, one hundred eighteen million, five hundred three thousand, three hundred eleven".