2105388918 has 12 divisors (see below), whose sum is σ = 4561676028. Its totient is φ = 701796300.

The previous prime is 2105388913. The next prime is 2105388931. The reversal of 2105388918 is 8198835012.

It is a happy number.

2105388918 is a `hidden beast` number, since 21 + 0 + 538 + 8 + 91 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105388913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58483008 + ... + 58483043.

It is an arithmetic number, because the mean of its divisors is an integer number (380139669).

Almost surely, 2^2105388918 is an apocalyptic number.

2105388918 is an abundant number, since it is smaller than the sum of its proper divisors (2456287110).

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

2105388918 is a wasteful number, since it uses less digits than its factorization.

2105388918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116966059 (or 116966056 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 2105388918 is about 45884.5171926217. The cubic root of 2105388918 is about 1281.6736160295.

The spelling of 2105388918 in words is "two billion, one hundred five million, three hundred eighty-eight thousand, nine hundred eighteen".