3020320021 has 4 divisors (see below), whose sum is σ = 3058552000. Its totient is φ = 2982088044.

The previous prime is 3020320013. The next prime is 3020320067. The reversal of 3020320021 is 1200230203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3020320021 - 2³ = 3020320013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3020319983 and 3020320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020320081) 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, 19115871 + ... + 19116028.

It is an arithmetic number, because the mean of its divisors is an integer number (764638000).

Almost surely, 2^3020320021 is an apocalyptic number.

It is an amenable number.

3020320021 is a deficient number, since it is larger than the sum of its proper divisors (38231979).

3020320021 is an equidigital number, since it uses as much as digits as its factorization.

3020320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38231978.

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

The square root of 3020320021 is about 54957.4382681726. The cubic root of 3020320021 is about 1445.4985282738.

Adding to 3020320021 its reverse (1200230203), we get a palindrome (4220550224).

The spelling of 3020320021 in words is "three billion, twenty million, three hundred twenty thousand, twenty-one".