20413321446221 has 16 divisors (see below), whose sum is σ = 22328755118208. Its totient is φ = 18507865651200.

The previous prime is 20413321446179. The next prime is 20413321446247. The reversal of 20413321446221 is 12264412331402.

It is a cyclic number.

It is not a de Polignac number, because 20413321446221 - 2³⁰ = 20412247704397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413321446281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12122045 + ... + 13702941.

It is an arithmetic number, because the mean of its divisors is an integer number (1395547194888).

Almost surely, 2^{20413321446221} is an apocalyptic number.

It is an amenable number.

20413321446221 is a deficient number, since it is larger than the sum of its proper divisors (1915433671987).

20413321446221 is a wasteful number, since it uses less digits than its factorization.

20413321446221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584052.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 20413321446221 its reverse (12264412331402), we get a palindrome (32677733777623).

The spelling of 20413321446221 in words is "twenty trillion, four hundred thirteen billion, three hundred twenty-one million, four hundred forty-six thousand, two hundred twenty-one".