20013320010021 has 16 divisors (see below), whose sum is σ = 28956441877440. Its totient is φ = 12221874812160.

The previous prime is 20013320010017. The next prime is 20013320010043. The reversal of 20013320010021 is 12001002331002.

It is not a de Polignac number, because 20013320010021 - 2² = 20013320010017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013320010521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958628676 + ... + 1958638893.

It is an arithmetic number, because the mean of its divisors is an integer number (1809777617340).

Almost surely, 2^{20013320010021} is an apocalyptic number.

It is an amenable number.

20013320010021 is a deficient number, since it is larger than the sum of its proper divisors (8943121867419).

20013320010021 is a wasteful number, since it uses less digits than its factorization.

20013320010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917267716.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20013320010021 its reverse (12001002331002), we get a palindrome (32014322341023).

The spelling of 20013320010021 in words is "twenty trillion, thirteen billion, three hundred twenty million, ten thousand, twenty-one".