20033021213 has 4 divisors (see below), whose sum is σ = 20286603840. Its totient is φ = 19779438588.

The previous prime is 20033021191. The next prime is 20033021227. The reversal of 20033021213 is 31212033002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20033021213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20033021191 and 20033021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033021233) 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 3 ways as a sum of consecutive naturals, for example, 126791195 + ... + 126791352.

It is an arithmetic number, because the mean of its divisors is an integer number (5071650960).

Almost surely, 2^20033021213 is an apocalyptic number.

It is an amenable number.

20033021213 is a deficient number, since it is larger than the sum of its proper divisors (253582627).

20033021213 is an equidigital number, since it uses as much as digits as its factorization.

20033021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253582626.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20033021213 its reverse (31212033002), we get a palindrome (51245054215).

The spelling of 20033021213 in words is "twenty billion, thirty-three million, twenty-one thousand, two hundred thirteen".