20320030321 has 4 divisors (see below), whose sum is σ = 20321183232. Its totient is φ = 20318877412.

The previous prime is 20320030273. The next prime is 20320030441. The reversal of 20320030321 is 12303002302.

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.

It is a cyclic number.

It is not a de Polignac number, because 20320030321 - 2⁷ = 20320030193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320030295 and 20320030304.

It is not an unprimeable number, because it can be changed into a prime (20320031321) 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, 549601 + ... + 585406.

It is an arithmetic number, because the mean of its divisors is an integer number (5080295808).

Almost surely, 2^20320030321 is an apocalyptic number.

It is an amenable number.

20320030321 is a deficient number, since it is larger than the sum of its proper divisors (1152911).

20320030321 is a wasteful number, since it uses less digits than its factorization.

20320030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152910.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20320030321 its reverse (12303002302), we get a palindrome (32623032623).

The spelling of 20320030321 in words is "twenty billion, three hundred twenty million, thirty thousand, three hundred twenty-one".