20716784542368 has 240 divisors, whose sum is σ = 61589089346400. Its totient is φ = 6859217500416.

The previous prime is 20716784542327. The next prime is 20716784542379. The reversal of 20716784542368 is 86324548761702.

20716784542368 is a `hidden beast` number, since 2 + 0 + 7 + 1 + 6 + 7 + 84 + 542 + 3 + 6 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 93738171 + ... + 93958917.

It is an arithmetic number, because the mean of its divisors is an integer number (256621205610).

Almost surely, 2^{20716784542368} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20716784542368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30794544673200).

20716784542368 is an abundant number, since it is smaller than the sum of its proper divisors (40872304804032).

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

20716784542368 is an frugal number, since it uses more digits than its factorization.

20716784542368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220933 (or 220901 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 63.

The spelling of 20716784542368 in words is "twenty trillion, seven hundred sixteen billion, seven hundred eighty-four million, five hundred forty-two thousand, three hundred sixty-eight".