2118688842 has 24 divisors (see below), whose sum is σ = 4329114048. Its totient is φ = 690951280.

The previous prime is 2118688787. The next prime is 2118688843. The reversal of 2118688842 is 2488868112.

It is a junction number, because it is equal to n+sod(n) for n = 2118688791 and 2118688800.

It is not an unprimeable number, because it can be changed into a prime (2118688843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771592 + ... + 774332.

It is an arithmetic number, because the mean of its divisors is an integer number (180379752).

Almost surely, 2^2118688842 is an apocalyptic number.

2118688842 is an abundant number, since it is smaller than the sum of its proper divisors (2210425206).

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

2118688842 is an frugal number, since it uses more digits than its factorization.

2118688842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5534 (or 2793 counting only the distinct ones).

The product of its digits is 393216, while the sum is 48.

The square root of 2118688842 is about 46029.2172646896. The cubic root of 2118688842 is about 1284.3667673924.

The spelling of 2118688842 in words is "two billion, one hundred eighteen million, six hundred eighty-eight thousand, eight hundred forty-two".