20266646006221 has 8 divisors (see below), whose sum is σ = 20347630934400. Its totient is φ = 20185792017648.

The previous prime is 20266646006213. The next prime is 20266646006239. The reversal of 20266646006221 is 12260064666202.

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 20266646006221 - 2³ = 20266646006213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266646006291) 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, 32424721 + ... + 33043846.

It is an arithmetic number, because the mean of its divisors is an integer number (2543453866800).

Almost surely, 2^{20266646006221} is an apocalyptic number.

It is an amenable number.

20266646006221 is a deficient number, since it is larger than the sum of its proper divisors (80984928179).

20266646006221 is an equidigital number, since it uses as much as digits as its factorization.

20266646006221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65469803.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 20266646006221 in words is "twenty trillion, two hundred sixty-six billion, six hundred forty-six million, six thousand, two hundred twenty-one".