20321071304 has 16 divisors (see below), whose sum is σ = 38243655900. Its totient is φ = 10122763072.

The previous prime is 20321071271. The next prime is 20321071307. The reversal of 20321071304 is 40317012302.

It can be written as a sum of positive squares in 2 ways, for example, as 20051126404 + 269944900 = 141602^2 + 16430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20321071304.

It is not an unprimeable number, because it can be changed into a prime (20321071307) 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, 4719287 + ... + 4723590.

Almost surely, 2^20321071304 is an apocalyptic number.

It is an amenable number.

20321071304 is a deficient number, since it is larger than the sum of its proper divisors (17922584596).

20321071304 is a wasteful number, since it uses less digits than its factorization.

20321071304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9443152 (or 9443148 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 20321071304 its reverse (40317012302), we get a palindrome (60638083606).

The spelling of 20321071304 in words is "twenty billion, three hundred twenty-one million, seventy-one thousand, three hundred four".