2118287840 has 48 divisors (see below), whose sum is σ = 5074967520. Its totient is φ = 835376640.

The previous prime is 2118287819. The next prime is 2118287863. The reversal of 2118287840 is 487828112.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 81875 + ... + 104594.

It is an arithmetic number, because the mean of its divisors is an integer number (105728490).

Almost surely, 2^2118287840 is an apocalyptic number.

2118287840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118287840 is an abundant number, since it is smaller than the sum of its proper divisors (2956679680).

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

2118287840 is a wasteful number, since it uses less digits than its factorization.

2118287840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186555 (or 186547 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 41.

The square root of 2118287840 is about 46024.8611078839. The cubic root of 2118287840 is about 1284.2857320324.

The spelling of 2118287840 in words is "two billion, one hundred eighteen million, two hundred eighty-seven thousand, eight hundred forty".