20744920601856 has 864 divisors, whose sum is σ = 71631330825600. Its totient is φ = 5702300467200.

The previous prime is 20744920601843. The next prime is 20744920601863. The reversal of 20744920601856 is 65810602944702.

20744920601856 is a `hidden beast` number, since 2 + 0 + 7 + 4 + 4 + 9 + 20 + 601 + 8 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1466168670 + ... + 1466182818.

It is an arithmetic number, because the mean of its divisors is an integer number (82906632900).

Almost surely, 2^{20744920601856} 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 20744920601856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35815665412800).

20744920601856 is an abundant number, since it is smaller than the sum of its proper divisors (50886410223744).

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

20744920601856 is a wasteful number, since it uses less digits than its factorization.

20744920601856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14323 (or 14306 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20744920601856 in words is "twenty trillion, seven hundred forty-four billion, nine hundred twenty million, six hundred one thousand, eight hundred fifty-six".