330020621 has 4 divisors (see below), whose sum is σ = 377166432. Its totient is φ = 282874812.

The previous prime is 330020597. The next prime is 330020623. The reversal of 330020621 is 126020033.

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 330020621 - 2¹⁸ = 329758477 is a prime.

It is a super-2 number, since 2×330020621² = 217827220570451282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 330020621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330020623) 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, 23572895 + ... + 23572908.

It is an arithmetic number, because the mean of its divisors is an integer number (94291608).

Almost surely, 2^330020621 is an apocalyptic number.

It is an amenable number.

330020621 is a deficient number, since it is larger than the sum of its proper divisors (47145811).

330020621 is an equidigital number, since it uses as much as digits as its factorization.

330020621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47145810.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 330020621 is about 18166.4696900636. The cubic root of 330020621 is about 691.0567166243.

Adding to 330020621 its reverse (126020033), we get a palindrome (456040654).

The spelling of 330020621 in words is "three hundred thirty million, twenty thousand, six hundred twenty-one".