2105639112 has 32 divisors (see below), whose sum is σ = 5316223680. Its totient is φ = 694929600.

The previous prime is 2105639077. The next prime is 2105639117. The reversal of 2105639112 is 2119365012.

It is a self number, because there is not a number n which added to its sum of digits gives 2105639112.

It is not an unprimeable number, because it can be changed into a prime (2105639117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431908 + ... + 436755.

It is an arithmetic number, because the mean of its divisors is an integer number (166131990).

Almost surely, 2^2105639112 is an apocalyptic number.

It is an amenable number.

2105639112 is an abundant number, since it is smaller than the sum of its proper divisors (3210584568).

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

2105639112 is a wasteful number, since it uses less digits than its factorization.

2105639112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868773 (or 868769 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2105639112 is about 45887.2434561066. The cubic root of 2105639112 is about 1281.7243832685.

The spelling of 2105639112 in words is "two billion, one hundred five million, six hundred thirty-nine thousand, one hundred twelve".