2106856820 has 24 divisors (see below), whose sum is σ = 4425792000. Its totient is φ = 842477472.

The previous prime is 2106856771. The next prime is 2106856837. The reversal of 2106856820 is 286586012.

2106856820 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56381 + ... + 85979.

It is an arithmetic number, because the mean of its divisors is an integer number (184408000).

Almost surely, 2^2106856820 is an apocalyptic number.

2106856820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106856820 is an abundant number, since it is smaller than the sum of its proper divisors (2318935180).

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

2106856820 is a wasteful number, since it uses less digits than its factorization.

2106856820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33167 (or 33165 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 2106856820 is about 45900.5100189529. The cubic root of 2106856820 is about 1281.9714128213.

The spelling of 2106856820 in words is "two billion, one hundred six million, eight hundred fifty-six thousand, eight hundred twenty".