20320113213 has 48 divisors (see below), whose sum is σ = 31404172800. Its totient is φ = 12637710720.

The previous prime is 20320113193. The next prime is 20320113221. The reversal of 20320113213 is 31231102302.

20320113213 is a `hidden beast` number, since 20 + 320 + 1 + 1 + 321 + 3 = 666.

It is not a de Polignac number, because 20320113213 - 2¹⁶ = 20320047677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320113223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1116178 + ... + 1134236.

It is an arithmetic number, because the mean of its divisors is an integer number (654253600).

Almost surely, 2^20320113213 is an apocalyptic number.

It is an amenable number.

20320113213 is a deficient number, since it is larger than the sum of its proper divisors (11084059587).

20320113213 is a wasteful number, since it uses less digits than its factorization.

20320113213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18242 (or 18239 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20320113213 its reverse (31231102302), we get a palindrome (51551215515).

The spelling of 20320113213 in words is "twenty billion, three hundred twenty million, one hundred thirteen thousand, two hundred thirteen".