20033031213 has 80 divisors (see below), whose sum is σ = 32951484720. Its totient is φ = 12052924416.

The previous prime is 20033031173. The next prime is 20033031223. The reversal of 20033031213 is 31213033002.

20033031213 is a `hidden beast` number, since 20 + 0 + 330 + 312 + 1 + 3 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1372924809 + 18660106404 = 37053^2 + 136602^2 .

It is not a de Polignac number, because 20033031213 - 2²⁸ = 19764595757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033031223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24164883 + ... + 24165711.

It is an arithmetic number, because the mean of its divisors is an integer number (411893559).

Almost surely, 2^20033031213 is an apocalyptic number.

It is an amenable number.

20033031213 is a deficient number, since it is larger than the sum of its proper divisors (12918453507).

20033031213 is a wasteful number, since it uses less digits than its factorization.

20033031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20033031213 its reverse (31213033002), we get a palindrome (51246064215).

The spelling of 20033031213 in words is "twenty billion, thirty-three million, thirty-one thousand, two hundred thirteen".