2021829 has 4 divisors (see below), whose sum is σ = 2695776. Its totient is φ = 1347884.

The previous prime is 2021807. The next prime is 2021837. The reversal of 2021829 is 9281202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021829 - 2⁸ = 2021573 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2021799 and 2021808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021839) by changing a digit.

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, 336969 + ... + 336974.

It is an arithmetic number, because the mean of its divisors is an integer number (673944).

2^2021829 is an apocalyptic number.

It is an amenable number.

2021829 is a deficient number, since it is larger than the sum of its proper divisors (673947).

2021829 is an equidigital number, since it uses as much as digits as its factorization.

2021829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673946.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2021829 is about 1421.9103347258. The cubic root of 2021829 is about 126.4488276414.

It can be divided in two parts, 2021 and 829, that added together give a triangular number (2850 = T₇₅).

The spelling of 2021829 in words is "two million, twenty-one thousand, eight hundred twenty-nine".