20003331021 has 16 divisors (see below), whose sum is σ = 26862239040. Its totient is φ = 13240229760.

The previous prime is 20003331017. The next prime is 20003331037. The reversal of 20003331021 is 12013330002.

It is not a de Polignac number, because 20003331021 - 2² = 20003331017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003331001) 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 15 ways as a sum of consecutive naturals, for example, 306361 + ... + 365873.

It is an arithmetic number, because the mean of its divisors is an integer number (1678889940).

Almost surely, 2^20003331021 is an apocalyptic number.

It is an amenable number.

20003331021 is a deficient number, since it is larger than the sum of its proper divisors (6858908019).

20003331021 is a wasteful number, since it uses less digits than its factorization.

20003331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60316.

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

Adding to 20003331021 its reverse (12013330002), we get a palindrome (32016661023).

The spelling of 20003331021 in words is "twenty billion, three million, three hundred thirty-one thousand, twenty-one".