20033130021 has 12 divisors (see below), whose sum is σ = 28374492192. Its totient is φ = 12569806528.

The previous prime is 20033129989. The next prime is 20033130037. The reversal of 20033130021 is 12003133002.

It is not a de Polignac number, because 20033130021 - 2⁵ = 20033129989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033130041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11552265 + ... + 11553998.

It is an arithmetic number, because the mean of its divisors is an integer number (2364541016).

Almost surely, 2^20033130021 is an apocalyptic number.

It is an amenable number.

20033130021 is a deficient number, since it is larger than the sum of its proper divisors (8341362171).

20033130021 is a wasteful number, since it uses less digits than its factorization.

20033130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23106300 (or 23106283 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20033130021 its reverse (12003133002), we get a palindrome (32036263023).

The spelling of 20033130021 in words is "twenty billion, thirty-three million, one hundred thirty thousand, twenty-one".