20322613 has 4 divisors (see below), whose sum is σ = 20334528. Its totient is φ = 20310700.

The previous prime is 20322607. The next prime is 20322623. The reversal of 20322613 is 31622302.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31622302 = 2 ⋅15811151.

It is a cyclic number.

It is not a de Polignac number, because 20322613 - 2¹⁷ = 20191541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20322623) 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, 2863 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (5083632).

Almost surely, 2^20322613 is an apocalyptic number.

It is an amenable number.

20322613 is a deficient number, since it is larger than the sum of its proper divisors (11915).

20322613 is an equidigital number, since it uses as much as digits as its factorization.

20322613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11914.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20322613 is about 4508.0608913368. The cubic root of 20322613 is about 272.8934943038.

Adding to 20322613 its reverse (31622302), we get a palindrome (51944915).

The spelling of 20322613 in words is "twenty million, three hundred twenty-two thousand, six hundred thirteen".