20080321 has 8 divisors (see below), whose sum is σ = 21257600. Its totient is φ = 18915120.

The previous prime is 20080289. The next prime is 20080331. The reversal of 20080321 is 12308002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20080321 - 2⁵ = 20080289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20080295 and 20080304.

It is not an unprimeable number, because it can be changed into a prime (20080331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (2657200).

Almost surely, 2^20080321 is an apocalyptic number.

It is an amenable number.

20080321 is a deficient number, since it is larger than the sum of its proper divisors (1177279).

20080321 is a wasteful number, since it uses less digits than its factorization.

20080321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20080321 is about 4481.1071176663. The cubic root of 20080321 is about 271.8046508608.

Adding to 20080321 its reverse (12308002), we get a palindrome (32388323).

The spelling of 20080321 in words is "twenty million, eighty thousand, three hundred twenty-one".