2081920128 has 32 divisors (see below), whose sum is σ = 5530101360. Its totient is φ = 693973248.

The previous prime is 2081920111. The next prime is 2081920219. The reversal of 2081920128 is 8210291802.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2710450 + ... + 2711217.

Almost surely, 2^2081920128 is an apocalyptic number.

It is an amenable number.

2081920128 is an abundant number, since it is smaller than the sum of its proper divisors (3448181232).

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

2081920128 is an equidigital number, since it uses as much as digits as its factorization.

2081920128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421684 (or 5421672 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 2081920128 is about 45628.0629437630. The cubic root of 2081920128 is about 1276.8935346456.

The spelling of 2081920128 in words is "two billion, eighty-one million, nine hundred twenty thousand, one hundred twenty-eight".