20330021321 has 4 divisors (see below), whose sum is σ = 20331552000. Its totient is φ = 20328490644.

The previous prime is 20330021317. The next prime is 20330021323. The reversal of 20330021321 is 12312003302.

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 20330021321 - 2² = 20330021317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330021321.

It is not an unprimeable number, because it can be changed into a prime (20330021323) 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 3 ways as a sum of consecutive naturals, for example, 745241 + ... + 772038.

It is an arithmetic number, because the mean of its divisors is an integer number (5082888000).

Almost surely, 2^20330021321 is an apocalyptic number.

It is an amenable number.

20330021321 is a deficient number, since it is larger than the sum of its proper divisors (1530679).

20330021321 is a wasteful number, since it uses less digits than its factorization.

20330021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530678.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20330021321 its reverse (12312003302), we get a palindrome (32642024623).

The spelling of 20330021321 in words is "twenty billion, three hundred thirty million, twenty-one thousand, three hundred twenty-one".