2021824 has 28 divisors (see below), whose sum is σ = 4586224. Its totient is φ = 866304.

The previous prime is 2021807. The next prime is 2021837. The reversal of 2021824 is 4281202.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1809 + ... + 2704.

2^2021824 is an apocalyptic number.

It is an amenable number.

2021824 is an abundant number, since it is smaller than the sum of its proper divisors (2564400).

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

2021824 is an equidigital number, since it uses as much as digits as its factorization.

2021824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 4522 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2021824 is about 1421.9085765266. The cubic root of 2021824 is about 126.4487234049.

The spelling of 2021824 in words is "two million, twenty-one thousand, eight hundred twenty-four".