20721841710048 has 72 divisors (see below), whose sum is σ = 58928531197536. Its totient is φ = 6907187520000.

The previous prime is 20721841710047. The next prime is 20721841710079. The reversal of 20721841710048 is 84001714812702.

20721841710048 is a `hidden beast` number, since 2 + 0 + 7 + 218 + 417 + 10 + 0 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 20721841709985 and 20721841710012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20721841710047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22884153 + ... + 23772423.

It is an arithmetic number, because the mean of its divisors is an integer number (818451822188).

Almost surely, 2^{20721841710048} is an apocalyptic number.

It is an amenable number.

20721841710048 is an abundant number, since it is smaller than the sum of its proper divisors (38206689487488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20721841710048 is a wasteful number, since it uses less digits than its factorization.

20721841710048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969288 (or 969277 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The spelling of 20721841710048 in words is "twenty trillion, seven hundred twenty-one billion, eight hundred forty-one million, seven hundred ten thousand, forty-eight".