220320013 has 4 divisors (see below), whose sum is σ = 229899168. Its totient is φ = 210740860.

The previous prime is 220319971. The next prime is 220320043. The reversal of 220320013 is 310023022.

It is a happy number.

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: 310023022 = 2 ⋅155011511.

It is a cyclic number.

It is not a de Polignac number, because 220320013 - 2⁹ = 220319501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220319975 and 220320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220320043) 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, 4789543 + ... + 4789588.

It is an arithmetic number, because the mean of its divisors is an integer number (57474792).

Almost surely, 2^220320013 is an apocalyptic number.

220320013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

220320013 is a deficient number, since it is larger than the sum of its proper divisors (9579155).

220320013 is an equidigital number, since it uses as much as digits as its factorization.

220320013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579154.

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

The square root of 220320013 is about 14843.1806901351. The cubic root of 220320013 is about 603.9736376152.

Adding to 220320013 its reverse (310023022), we get a palindrome (530343035).

The spelling of 220320013 in words is "two hundred twenty million, three hundred twenty thousand, thirteen".