20704579056 has 240 divisors, whose sum is σ = 67511179008. Its totient is φ = 5801241600.

The previous prime is 20704579043. The next prime is 20704579097. The reversal of 20704579056 is 65097540702.

20704579056 is a `hidden beast` number, since 2 + 0 + 70 + 4 + 579 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×20704579056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18977071 + ... + 18978161.

Almost surely, 2^20704579056 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 20704579056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33755589504).

20704579056 is an abundant number, since it is smaller than the sum of its proper divisors (46806599952).

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

20704579056 is a wasteful number, since it uses less digits than its factorization.

20704579056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 20704579056 in words is "twenty billion, seven hundred four million, five hundred seventy-nine thousand, fifty-six".