2021673 has 4 divisors (see below), whose sum is σ = 2695568. Its totient is φ = 1347780.

The previous prime is 2021671. The next prime is 2021693. The reversal of 2021673 is 3761202.

It is a happy number.

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 not a de Polignac number, because 2021673 - 2¹ = 2021671 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (2021671) 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, 336943 + ... + 336948.

It is an arithmetic number, because the mean of its divisors is an integer number (673892).

2^2021673 is an apocalyptic number.

It is an amenable number.

2021673 is a deficient number, since it is larger than the sum of its proper divisors (673895).

2021673 is an equidigital number, since it uses as much as digits as its factorization.

2021673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673894.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2021673 is about 1421.8554778880. The cubic root of 2021673 is about 126.4455753840.

Adding to 2021673 its reverse (3761202), we get a palindrome (5782875).

The spelling of 2021673 in words is "two million, twenty-one thousand, six hundred seventy-three".