320330021 has 8 divisors (see below), whose sum is σ = 349629888. Its totient is φ = 291060000.

The previous prime is 320330011. The next prime is 320330029. The reversal of 320330021 is 120033023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320330021 - 2¹⁰ = 320328997 is a prime.

It is a super-3 number, since 3×320330021³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320329978 and 320330005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320330029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19121 + ... + 31721.

It is an arithmetic number, because the mean of its divisors is an integer number (43703736).

Almost surely, 2^320330021 is an apocalyptic number.

It is an amenable number.

320330021 is a deficient number, since it is larger than the sum of its proper divisors (29299867).

320330021 is a wasteful number, since it uses less digits than its factorization.

320330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 320330021 is about 17897.7658102904. The cubic root of 320330021 is about 684.2254345385.

Adding to 320330021 its reverse (120033023), we get a palindrome (440363044).

The spelling of 320330021 in words is "three hundred twenty million, three hundred thirty thousand, twenty-one".