20320221213 has 12 divisors (see below), whose sum is σ = 30896243040. Its totient is φ = 12833823816.

The previous prime is 20320221199. The next prime is 20320221221. The reversal of 20320221213 is 31212202302.

It is not a de Polignac number, because 20320221213 - 2¹⁰ = 20320220189 is a prime.

It is a super-2 number, since 2×20320221213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320221223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59415681 + ... + 59416022.

It is an arithmetic number, because the mean of its divisors is an integer number (2574686920).

Almost surely, 2^20320221213 is an apocalyptic number.

It is an amenable number.

20320221213 is a deficient number, since it is larger than the sum of its proper divisors (10576021827).

20320221213 is a wasteful number, since it uses less digits than its factorization.

20320221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118831728 (or 118831725 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20320221213 its reverse (31212202302), we get a palindrome (51532423515).

The spelling of 20320221213 in words is "twenty billion, three hundred twenty million, two hundred twenty-one thousand, two hundred thirteen".