2105805976 has 32 divisors (see below), whose sum is σ = 4043476800. Its totient is φ = 1027585440.

The previous prime is 2105805973. The next prime is 2105806007. The reversal of 2105805976 is 6795085012.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105805973) 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 7 ways as a sum of consecutive naturals, for example, 828115 + ... + 830653.

It is an arithmetic number, because the mean of its divisors is an integer number (126358650).

Almost surely, 2^2105805976 is an apocalyptic number.

It is an amenable number.

2105805976 is a deficient number, since it is larger than the sum of its proper divisors (1937670824).

2105805976 is a wasteful number, since it uses less digits than its factorization.

2105805976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999 (or 4995 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 2105805976 is about 45889.0616160322. The cubic root of 2105805976 is about 1281.7582396572.

The spelling of 2105805976 in words is "two billion, one hundred five million, eight hundred five thousand, nine hundred seventy-six".