20302003321 has 4 divisors (see below), whose sum is σ = 20302297972. Its totient is φ = 20301708672.

The previous prime is 20302003297. The next prime is 20302003357. The reversal of 20302003321 is 12330020302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12330020302 = 2 ⋅6165010151.

It can be written as a sum of positive squares in 2 ways, for example, as 9281202921 + 11020800400 = 96339^2 + 104980^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302003321 - 2¹⁵ = 20301970553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302003295 and 20302003304.

It is not an unprimeable number, because it can be changed into a prime (20302004321) 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, 17485 + ... + 202261.

It is an arithmetic number, because the mean of its divisors is an integer number (5075574493).

Almost surely, 2^20302003321 is an apocalyptic number.

It is an amenable number.

20302003321 is a deficient number, since it is larger than the sum of its proper divisors (294651).

20302003321 is a wasteful number, since it uses less digits than its factorization.

20302003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294650.

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

Adding to 20302003321 its reverse (12330020302), we get a palindrome (32632023623).

The spelling of 20302003321 in words is "twenty billion, three hundred two million, three thousand, three hundred twenty-one".