2040232021 has 4 divisors (see below), whose sum is σ = 2040322444. Its totient is φ = 2040141600.

The previous prime is 2040232009. The next prime is 2040232079. The reversal of 2040232021 is 1202320402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 681940996 + 1358291025 = 26114^2 + 36855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040232021 - 2⁹ = 2040231509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2040231986 and 2040232004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040232001) 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, 19681 + ... + 66841.

It is an arithmetic number, because the mean of its divisors is an integer number (510080611).

Almost surely, 2^2040232021 is an apocalyptic number.

It is an amenable number.

2040232021 is a deficient number, since it is larger than the sum of its proper divisors (90423).

2040232021 is an equidigital number, since it uses as much as digits as its factorization.

2040232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90422.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2040232021 is about 45168.9276051580. The cubic root of 2040232021 is about 1268.3132216311.

Adding to 2040232021 its reverse (1202320402), we get a palindrome (3242552423).

The spelling of 2040232021 in words is "two billion, forty million, two hundred thirty-two thousand, twenty-one".