2105817056 has 24 divisors (see below), whose sum is σ = 4738088880. Its totient is φ = 902492928.

The previous prime is 2105817019. The next prime is 2105817059. The reversal of 2105817056 is 6507185012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105817059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4700261 + ... + 4700708.

It is an arithmetic number, because the mean of its divisors is an integer number (197420370).

Almost surely, 2^2105817056 is an apocalyptic number.

It is an amenable number.

2105817056 is an abundant number, since it is smaller than the sum of its proper divisors (2632271824).

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

2105817056 is an equidigital number, since it uses as much as digits as its factorization.

2105817056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9400986 (or 9400978 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 2105817056 is about 45889.1823418112. The cubic root of 2105817056 is about 1281.7604877048.

The spelling of 2105817056 in words is "two billion, one hundred five million, eight hundred seventeen thousand, fifty-six".