20004313 has 4 divisors (see below), whose sum is σ = 22862080. Its totient is φ = 17146548.

The previous prime is 20004311. The next prime is 20004323. The reversal of 20004313 is 31340002.

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: 31340002 = 2 ⋅15670001.

It is a cyclic number.

It is not a de Polignac number, because 20004313 - 2¹ = 20004311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004293 and 20004302.

It is not an unprimeable number, because it can be changed into a prime (20004311) 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, 1428873 + ... + 1428886.

It is an arithmetic number, because the mean of its divisors is an integer number (5715520).

Almost surely, 2^20004313 is an apocalyptic number.

It is an amenable number.

20004313 is a deficient number, since it is larger than the sum of its proper divisors (2857767).

20004313 is an equidigital number, since it uses as much as digits as its factorization.

20004313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857766.

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

The square root of 20004313 is about 4472.6181370647. The cubic root of 20004313 is about 271.4612723957.

Adding to 20004313 its reverse (31340002), we get a palindrome (51344315).

The spelling of 20004313 in words is "twenty million, four thousand, three hundred thirteen".