2108931812 has 12 divisors (see below), whose sum is σ = 3974525436. Its totient is φ = 973353120.

The previous prime is 2108931793. The next prime is 2108931827. The reversal of 2108931812 is 2181398012.

It can be written as a sum of positive squares in 2 ways, for example, as 1273490596 + 835441216 = 35686^2 + 28904^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20278139 + ... + 20278242.

It is an arithmetic number, because the mean of its divisors is an integer number (331210453).

Almost surely, 2^2108931812 is an apocalyptic number.

It is an amenable number.

2108931812 is a deficient number, since it is larger than the sum of its proper divisors (1865593624).

2108931812 is a wasteful number, since it uses less digits than its factorization.

2108931812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40556398 (or 40556396 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 2108931812 is about 45923.1076039068. The cubic root of 2108931812 is about 1282.3921355452.

The spelling of 2108931812 in words is "two billion, one hundred eight million, nine hundred thirty-one thousand, eight hundred twelve".