20323020321 has 12 divisors (see below), whose sum is σ = 29371905940. Its totient is φ = 13541096160.

The previous prime is 20323020307. The next prime is 20323020329. The reversal of 20323020321 is 12302032302.

It is a happy number.

20323020321 is a `hidden beast` number, since 2 + 0 + 323 + 0 + 20 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14408641296 + 5914379025 = 120036^2 + 76905^2 .

It is not a de Polignac number, because 20323020321 - 2²¹ = 20320923169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323020294 and 20323020303.

It is not an unprimeable number, because it can be changed into a prime (20323020329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615010 + ... + 647211.

Almost surely, 2^20323020321 is an apocalyptic number.

It is an amenable number.

20323020321 is a deficient number, since it is larger than the sum of its proper divisors (9048885619).

20323020321 is a wasteful number, since it uses less digits than its factorization.

20323020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264016 (or 1264013 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20323020321 its reverse (12302032302), we get a palindrome (32625052623).

The spelling of 20323020321 in words is "twenty billion, three hundred twenty-three million, twenty thousand, three hundred twenty-one".