2021869928 has 16 divisors (see below), whose sum is σ = 4082622180. Its totient is φ = 933170688.

The previous prime is 2021869907. The next prime is 2021869931. The reversal of 2021869928 is 8299681202.

It can be written as a sum of positive squares in 2 ways, for example, as 1424458564 + 597411364 = 37742^2 + 24442^2 .

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, 9720425 + ... + 9720632.

Almost surely, 2^2021869928 is an apocalyptic number.

It is an amenable number.

2021869928 is an abundant number, since it is smaller than the sum of its proper divisors (2060752252).

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

2021869928 is a wasteful number, since it uses less digits than its factorization.

2021869928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19441076 (or 19441072 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 2021869928 is about 44965.2079723868. The cubic root of 2021869928 is about 1264.4968087254.

The spelling of 2021869928 in words is "two billion, twenty-one million, eight hundred sixty-nine thousand, nine hundred twenty-eight".