20430213331321 has 16 divisors (see below), whose sum is σ = 21781377092160. Its totient is φ = 19107633715200.

The previous prime is 20430213331279. The next prime is 20430213331373. The reversal of 20430213331321 is 12313331203402.

It is a cyclic number.

It is not a de Polignac number, because 20430213331321 - 2¹⁹ = 20430212807033 is a prime.

It is a super-3 number, since 3×20430213331321³ (a number of 41 digits) contains 333 as substring.

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 20430213331321.

It is not an unprimeable number, because it can be changed into a prime (20430213331421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13083031 + ... + 14561116.

It is an arithmetic number, because the mean of its divisors is an integer number (1361336068260).

Almost surely, 2^{20430213331321} is an apocalyptic number.

It is an amenable number.

20430213331321 is a deficient number, since it is larger than the sum of its proper divisors (1351163760839).

20430213331321 is a wasteful number, since it uses less digits than its factorization.

20430213331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27644664.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 20430213331321 its reverse (12313331203402), we get a palindrome (32743544534723).

The spelling of 20430213331321 in words is "twenty trillion, four hundred thirty billion, two hundred thirteen million, three hundred thirty-one thousand, three hundred twenty-one".