2021803 has 8 divisors (see below), whose sum is σ = 2319872. Its totient is φ = 1726056.

The previous prime is 2021801. The next prime is 2021807. The reversal of 2021803 is 3081202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021803 - 2¹ = 2021801 is a prime.

It is a Duffinian number.

2021803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2021801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176 + ... + 2962.

It is an arithmetic number, because the mean of its divisors is an integer number (289984).

2^2021803 is an apocalyptic number.

2021803 is a deficient number, since it is larger than the sum of its proper divisors (298069).

2021803 is an equidigital number, since it uses as much as digits as its factorization.

2021803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2021803 is about 1421.9011920665. The cubic root of 2021803 is about 126.4482856101.

The spelling of 2021803 in words is "two million, twenty-one thousand, eight hundred three".