32030020021 has 4 divisors (see below), whose sum is σ = 33134503500. Its totient is φ = 30925536544.

The previous prime is 32030020003. The next prime is 32030020039. The reversal of 32030020021 is 12002003023.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (32030020003) and next prime (32030020039).

It can be written as a sum of positive squares in 2 ways, for example, as 25515270225 + 6514749796 = 159735^2 + 80714^2 .

It is a cyclic number.

It is not a de Polignac number, because 32030020021 - 2⁹ = 32030019509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32030019983 and 32030020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32030027021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552241696 + ... + 552241753.

It is an arithmetic number, because the mean of its divisors is an integer number (8283625875).

Almost surely, 2^32030020021 is an apocalyptic number.

It is an amenable number.

32030020021 is a deficient number, since it is larger than the sum of its proper divisors (1104483479).

32030020021 is a wasteful number, since it uses less digits than its factorization.

32030020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104483478.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 32030020021 its reverse (12002003023), we get a palindrome (44032023044).

The spelling of 32030020021 in words is "thirty-two billion, thirty million, twenty thousand, twenty-one".