2100684866 has 16 divisors (see below), whose sum is σ = 3813008256. Its totient is φ = 847334976.

The previous prime is 2100684857. The next prime is 2100684869. The reversal of 2100684866 is 6684860012.

It is not an unprimeable number, because it can be changed into a prime (2100684869) 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, 4412966 + ... + 4413441.

It is an arithmetic number, because the mean of its divisors is an integer number (238313016).

Almost surely, 2^2100684866 is an apocalyptic number.

2100684866 is a deficient number, since it is larger than the sum of its proper divisors (1712323390).

2100684866 is a wasteful number, since it uses less digits than its factorization.

2100684866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8826433.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 2100684866 is about 45833.2288410930. The cubic root of 2100684866 is about 1280.7183601950.

The spelling of 2100684866 in words is "two billion, one hundred million, six hundred eighty-four thousand, eight hundred sixty-six".