20320433343221 has 8 divisors (see below), whose sum is σ = 22173693389184. Its totient is φ = 18468164617920.

The previous prime is 20320433343187. The next prime is 20320433343241. The reversal of 20320433343221 is 12234333402302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320433343221 - 2³⁴ = 20303253474037 is a prime.

It is a super-2 number, since 2×20320433343221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320433343241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247787300 + ... + 247869293.

It is an arithmetic number, because the mean of its divisors is an integer number (2771711673648).

Almost surely, 2^{20320433343221} is an apocalyptic number.

It is an amenable number.

20320433343221 is a deficient number, since it is larger than the sum of its proper divisors (1853260045963).

20320433343221 is a wasteful number, since it uses less digits than its factorization.

20320433343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495660331.

The product of its (nonzero) digits is 62208, while the sum is 32.

Adding to 20320433343221 its reverse (12234333402302), we get a palindrome (32554766745523).

The spelling of 20320433343221 in words is "twenty trillion, three hundred twenty billion, four hundred thirty-three million, three hundred forty-three thousand, two hundred twenty-one".