20320004613 has 16 divisors (see below), whose sum is σ = 30196912320. Its totient is φ = 12078763776.

The previous prime is 20320004597. The next prime is 20320004623. The reversal of 20320004613 is 31640002302.

It is a happy number.

It is not a de Polignac number, because 20320004613 - 2⁴ = 20320004597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20320004613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320004623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10484070 + ... + 10486007.

It is an arithmetic number, because the mean of its divisors is an integer number (1887307020).

Almost surely, 2^20320004613 is an apocalyptic number.

It is an amenable number.

20320004613 is a deficient number, since it is larger than the sum of its proper divisors (9876907707).

20320004613 is a wasteful number, since it uses less digits than its factorization.

20320004613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970116.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20320004613 its reverse (31640002302), we get a palindrome (51960006915).

The spelling of 20320004613 in words is "twenty billion, three hundred twenty million, four thousand, six hundred thirteen".