20648700221021 has 8 divisors (see below), whose sum is σ = 21595107435840. Its totient is φ = 19706346142912.

The previous prime is 20648700220999. The next prime is 20648700221027. The reversal of 20648700221021 is 12012200784602.

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 20648700221021 - 2⁶ = 20648700220957 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 (20648700221027) 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 7 ways as a sum of consecutive naturals, for example, 1013273756 + ... + 1013294133.

It is an arithmetic number, because the mean of its divisors is an integer number (2699388429480).

Almost surely, 2^{20648700221021} is an apocalyptic number.

It is an amenable number.

20648700221021 is a deficient number, since it is larger than the sum of its proper divisors (946407214819).

20648700221021 is a wasteful number, since it uses less digits than its factorization.

20648700221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026568355.

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 20648700221021 in words is "twenty trillion, six hundred forty-eight billion, seven hundred million, two hundred twenty-one thousand, twenty-one".