20320330 has 16 divisors (see below), whose sum is σ = 36701280. Its totient is φ = 8100432.

The previous prime is 20320303. The next prime is 20320343. The reversal of 20320330 is 3302302.

20320330 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×20320330² = 825831622617800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20320330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (2293830).

Almost surely, 2^20320330 is an apocalyptic number.

20320330 is a deficient number, since it is larger than the sum of its proper divisors (16380950).

20320330 is a wasteful number, since it uses less digits than its factorization.

20320330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933.

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 20320330 is about 4507.8076711413. The cubic root of 20320330 is about 272.8832751590.

Adding to 20320330 its reverse (3302302), we get a palindrome (23622632).

The spelling of 20320330 in words is "twenty million, three hundred twenty thousand, three hundred thirty".