20796491395680 has 1536 divisors, whose sum is σ = 92715433574400. Its totient is φ = 3773686579200.

The previous prime is 20796491395639. The next prime is 20796491395717. The reversal of 20796491395680 is 8659319469702.

It is a congruent number.

It is an unprimeable number.

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 255 ways as a sum of consecutive naturals, for example, 9759028215 + ... + 9759030345.

It is an arithmetic number, because the mean of its divisors is an integer number (60361610400).

It is a 2-persistent number, because it is pandigital, and so is 2⋅20796491395680 = 41592982791360, but 3⋅20796491395680 = 62389474187040 is not.

Almost surely, 2^{20796491395680} is an apocalyptic number.

20796491395680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20796491395680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46357716787200).

20796491395680 is an abundant number, since it is smaller than the sum of its proper divisors (71918942178720).

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

20796491395680 is a wasteful number, since it uses less digits than its factorization.

20796491395680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268 (or 3260 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 69.

The spelling of 20796491395680 in words is "twenty trillion, seven hundred ninety-six billion, four hundred ninety-one million, three hundred ninety-five thousand, six hundred eighty".