2128665020 has 12 divisors (see below), whose sum is σ = 4470196584. Its totient is φ = 851466000.

The previous prime is 2128665017. The next prime is 2128665041. The reversal of 2128665020 is 205668212.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53216606 + ... + 53216645.

It is an arithmetic number, because the mean of its divisors is an integer number (372516382).

Almost surely, 2^2128665020 is an apocalyptic number.

2128665020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2128665020 is an abundant number, since it is smaller than the sum of its proper divisors (2341531564).

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

2128665020 is a wasteful number, since it uses less digits than its factorization.

2128665020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106433260 (or 106433258 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2128665020 is about 46137.4578840230. The cubic root of 2128665020 is about 1286.3794922586.

The spelling of 2128665020 in words is "two billion, one hundred twenty-eight million, six hundred sixty-five thousand, twenty".