20413131332221 has 8 divisors (see below), whose sum is σ = 21987776807424. Its totient is φ = 18895745692560.

The previous prime is 20413131332171. The next prime is 20413131332257. The reversal of 20413131332221 is 12223313131402.

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 20413131332221 - 2³¹ = 20410983848573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20413131332221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413131332291) 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, 14314958146 + ... + 14314959571.

It is an arithmetic number, because the mean of its divisors is an integer number (2748472100928).

Almost surely, 2^{20413131332221} is an apocalyptic number.

It is an amenable number.

20413131332221 is a deficient number, since it is larger than the sum of its proper divisors (1574645475203).

20413131332221 is a wasteful number, since it uses less digits than its factorization.

20413131332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28629917771.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 20413131332221 its reverse (12223313131402), we get a palindrome (32636444463623).

The spelling of 20413131332221 in words is "twenty trillion, four hundred thirteen billion, one hundred thirty-one million, three hundred thirty-two thousand, two hundred twenty-one".