20003133331021 has 8 divisors (see below), whose sum is σ = 20056538120184. Its totient is φ = 19949770613760.

The previous prime is 20003133331009. The next prime is 20003133331043. The reversal of 20003133331021 is 12013333130002.

It can be written as a sum of positive squares in 4 ways, for example, as 4794615294921 + 15208518036100 = 2189661^2 + 3899810^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20003133331021 - 2⁵ = 20003133330989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003133330983 and 20003133331001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003133331061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9565690 + ... + 11467723.

It is an arithmetic number, because the mean of its divisors is an integer number (2507067265023).

Almost surely, 2^{20003133331021} is an apocalyptic number.

It is an amenable number.

20003133331021 is a deficient number, since it is larger than the sum of its proper divisors (53404789163).

20003133331021 is a wasteful number, since it uses less digits than its factorization.

20003133331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21035951.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20003133331021 its reverse (12013333130002), we get a palindrome (32016466461023).

The spelling of 20003133331021 in words is "twenty trillion, three billion, one hundred thirty-three million, three hundred thirty-one thousand, twenty-one".