20320413 has 8 divisors (see below), whose sum is σ = 27475776. Its totient is φ = 13356000.

The previous prime is 20320409. The next prime is 20320427. The reversal of 20320413 is 31402302.

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

It is not a de Polignac number, because 20320413 - 2² = 20320409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20320392 and 20320401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320453) 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, 47488 + ... + 47913.

It is an arithmetic number, because the mean of its divisors is an integer number (3434472).

Almost surely, 2^20320413 is an apocalyptic number.

It is an amenable number.

20320413 is a deficient number, since it is larger than the sum of its proper divisors (7155363).

20320413 is an equidigital number, since it uses as much as digits as its factorization.

20320413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95475.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20320413 is about 4507.8168773809. The cubic root of 20320413 is about 272.8836466963.

Adding to 20320413 its reverse (31402302), we get a palindrome (51722715).

The spelling of 20320413 in words is "twenty million, three hundred twenty thousand, four hundred thirteen".