20031312213 has 48 divisors (see below), whose sum is σ = 32161147200. Its totient is φ = 11912697600.

The previous prime is 20031312199. The next prime is 20031312241. The reversal of 20031312213 is 31221313002.

It is not a de Polignac number, because 20031312213 - 2¹⁰ = 20031311189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031312293) 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, 1216153 + ... + 1232513.

It is an arithmetic number, because the mean of its divisors is an integer number (670023900).

Almost surely, 2^20031312213 is an apocalyptic number.

It is an amenable number.

20031312213 is a deficient number, since it is larger than the sum of its proper divisors (12129834987).

20031312213 is a wasteful number, since it uses less digits than its factorization.

20031312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610 (or 16607 counting only the distinct ones).

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

Adding to 20031312213 its reverse (31221313002), we get a palindrome (51252625215).

The spelling of 20031312213 in words is "twenty billion, thirty-one million, three hundred twelve thousand, two hundred thirteen".