20320404304 has 10 divisors (see below), whose sum is σ = 39370783370. Its totient is φ = 10160202144.

The previous prime is 20320404239. The next prime is 20320404311. The reversal of 20320404304 is 40340402302.

It can be written as a sum of positive squares in only one way, i.e., 18610416400 + 1709987904 = 136420^2 + 41352^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635012619 + ... + 635012650.

It is an arithmetic number, because the mean of its divisors is an integer number (3937078337).

Almost surely, 2^20320404304 is an apocalyptic number.

It is an amenable number.

20320404304 is a deficient number, since it is larger than the sum of its proper divisors (19050379066).

20320404304 is a wasteful number, since it uses less digits than its factorization.

20320404304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270025277 (or 1270025271 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20320404304 its reverse (40340402302), we get a palindrome (60660806606).

The spelling of 20320404304 in words is "twenty billion, three hundred twenty million, four hundred four thousand, three hundred four".