20323313 has 4 divisors (see below), whose sum is σ = 21518820. Its totient is φ = 19127808.

The previous prime is 20323291. The next prime is 20323333. The reversal of 20323313 is 31332302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18601969 + 1721344 = 4313^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323313 - 2⁸ = 20323057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1195489 = 20323313 / (2 + 0 + 3 + 2 + 3 + 3 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323291 and 20323300.

It is not an unprimeable number, because it can be changed into a prime (20323333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597728 + ... + 597761.

It is an arithmetic number, because the mean of its divisors is an integer number (5379705).

Almost surely, 2^20323313 is an apocalyptic number.

It is an amenable number.

20323313 is a deficient number, since it is larger than the sum of its proper divisors (1195507).

20323313 is a wasteful number, since it uses less digits than its factorization.

20323313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195506.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 20323313 is about 4508.1385293711. The cubic root of 20323313 is about 272.8966274845.

Adding to 20323313 its reverse (31332302), we get a palindrome (51655615).

The spelling of 20323313 in words is "twenty million, three hundred twenty-three thousand, three hundred thirteen".