2021236 has 24 divisors (see below), whose sum is σ = 4153856. Its totient is φ = 842400.

The previous prime is 2021219. The next prime is 2021237. The reversal of 2021236 is 6321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021237) 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, 61 + ... + 2011.

2^2021236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076928).

2021236 is an abundant number, since it is smaller than the sum of its proper divisors (2132620).

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

2021236 is a wasteful number, since it uses less digits than its factorization.

2021236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2021236 is about 1421.7017971431. The cubic root of 2021236 is about 126.4364640031.

Adding to 2021236 its reverse (6321202), we get a palindrome (8342438).

The spelling of 2021236 in words is "two million, twenty-one thousand, two hundred thirty-six".