20321013213 has 16 divisors (see below), whose sum is σ = 30212352000. Its totient is φ = 13499125920.

The previous prime is 20321013191. The next prime is 20321013241. The reversal of 20321013213 is 31231012302.

20321013213 is a `hidden beast` number, since 20 + 321 + 0 + 1 + 321 + 3 = 666.

It is not a de Polignac number, because 20321013213 - 2³⁰ = 19247271389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321013283) 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, 1331613 + ... + 1346786.

It is an arithmetic number, because the mean of its divisors is an integer number (1888272000).

Almost surely, 2^20321013213 is an apocalyptic number.

It is an amenable number.

20321013213 is a deficient number, since it is larger than the sum of its proper divisors (9891338787).

20321013213 is a wasteful number, since it uses less digits than its factorization.

20321013213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678689 (or 2678683 counting only the distinct ones).

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

Adding to 20321013213 its reverse (31231012302), we get a palindrome (51552025515).

The spelling of 20321013213 in words is "twenty billion, three hundred twenty-one million, thirteen thousand, two hundred thirteen".