20310313 has 4 divisors (see below), whose sum is σ = 20613520. Its totient is φ = 20007108.

The previous prime is 20310287. The next prime is 20310317. The reversal of 20310313 is 31301302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31301302 = 2 ⋅15650651.

It is a cyclic number.

It is not a de Polignac number, because 20310313 - 2¹⁷ = 20179241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310293 and 20310302.

It is not an unprimeable number, because it can be changed into a prime (20310317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151503 + ... + 151636.

It is an arithmetic number, because the mean of its divisors is an integer number (5153380).

Almost surely, 2^20310313 is an apocalyptic number.

It is an amenable number.

20310313 is a deficient number, since it is larger than the sum of its proper divisors (303207).

20310313 is an equidigital number, since it uses as much as digits as its factorization.

20310313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303206.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20310313 is about 4506.6964619331. The cubic root of 20310313 is about 272.8384281011.

Adding to 20310313 its reverse (31301302), we get a palindrome (51611615).

The spelling of 20310313 in words is "twenty million, three hundred ten thousand, three hundred thirteen".