20320312 has 16 divisors (see below), whose sum is σ = 38160360. Its totient is φ = 10144224.

The previous prime is 20320303. The next prime is 20320343. The reversal of 20320312 is 21302302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20320292 and 20320301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4783 + ... + 7969.

Almost surely, 2^20320312 is an apocalyptic number.

It is an amenable number.

20320312 is a deficient number, since it is larger than the sum of its proper divisors (17840048).

20320312 is a wasteful number, since it uses less digits than its factorization.

20320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3986 counting only the distinct ones).

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

The square root of 20320312 is about 4507.8056746049. The cubic root of 20320312 is about 272.8831945845.

Adding to 20320312 its reverse (21302302), we get a palindrome (41622614).

The spelling of 20320312 in words is "twenty million, three hundred twenty thousand, three hundred twelve".