20031213033 has 32 divisors (see below), whose sum is σ = 33838560000. Its totient is φ = 11601785088.

The previous prime is 20031213019. The next prime is 20031213071. The reversal of 20031213033 is 33031213002.

It is not a de Polignac number, because 20031213033 - 2⁸ = 20031212777 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20031212997 and 20031213015.

It is not an unprimeable number, because it can be changed into a prime (20031213233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1672533 + ... + 1684466.

It is an arithmetic number, because the mean of its divisors is an integer number (1057455000).

Almost surely, 2^20031213033 is an apocalyptic number.

It is an amenable number.

20031213033 is a deficient number, since it is larger than the sum of its proper divisors (13807346967).

20031213033 is a wasteful number, since it uses less digits than its factorization.

20031213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357038 (or 3357032 counting only the distinct ones).

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

Adding to 20031213033 its reverse (33031213002), we get a palindrome (53062426035).

The spelling of 20031213033 in words is "twenty billion, thirty-one million, two hundred thirteen thousand, thirty-three".