2063821 has 4 divisors (see below), whose sum is σ = 2087100. Its totient is φ = 2040544.

The previous prime is 2063819. The next prime is 2063827. The reversal of 2063821 is 1283602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 741321 + 1322500 = 861^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2063821 - 2¹ = 2063819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2063792 and 2063801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2063827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11506 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (521775).

2^2063821 is an apocalyptic number.

It is an amenable number.

2063821 is a deficient number, since it is larger than the sum of its proper divisors (23279).

2063821 is an equidigital number, since it uses as much as digits as its factorization.

2063821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23278.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2063821 is about 1436.6005011833. The cubic root of 2063821 is about 127.3182544452.

The spelling of 2063821 in words is "two million, sixty-three thousand, eight hundred twenty-one".