20203332021 has 12 divisors (see below), whose sum is σ = 29191135948. Its totient is φ = 13464944064.

The previous prime is 20203331987. The next prime is 20203332031. The reversal of 20203332021 is 12023330202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11190677796 + 9012654225 = 105786^2 + 94935^2 .

It is not a de Polignac number, because 20203332021 - 2⁶ = 20203331957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20203331985 and 20203332003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203332031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296050 + ... + 357843.

Almost surely, 2^20203332021 is an apocalyptic number.

It is an amenable number.

20203332021 is a deficient number, since it is larger than the sum of its proper divisors (8987803927).

20203332021 is a wasteful number, since it uses less digits than its factorization.

20203332021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657332 (or 657329 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20203332021 its reverse (12023330202), we get a palindrome (32226662223).

The spelling of 20203332021 in words is "twenty billion, two hundred three million, three hundred thirty-two thousand, twenty-one".