20032301021 has 4 divisors (see below), whose sum is σ = 20115422844. Its totient is φ = 19949179200.

The previous prime is 20032301011. The next prime is 20032301171. The reversal of 20032301021 is 12010323002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15497760100 + 4534540921 = 124490^2 + 67339^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032301021 - 2⁶ = 20032300957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20032300987 and 20032301005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032301011) 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 3 ways as a sum of consecutive naturals, for example, 41560550 + ... + 41561031.

It is an arithmetic number, because the mean of its divisors is an integer number (5028855711).

Almost surely, 2^20032301021 is an apocalyptic number.

It is an amenable number.

20032301021 is a deficient number, since it is larger than the sum of its proper divisors (83121823).

20032301021 is an equidigital number, since it uses as much as digits as its factorization.

20032301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83121822.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20032301021 its reverse (12010323002), we get a palindrome (32042624023).

The spelling of 20032301021 in words is "twenty billion, thirty-two million, three hundred one thousand, twenty-one".