20727256256 has 112 divisors (see below), whose sum is σ = 52391462400. Its totient is φ = 7920488448.

The previous prime is 20727256243. The next prime is 20727256261. The reversal of 20727256256 is 65265272702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×20727256256² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73085 + ... + 216323.

Almost surely, 2^20727256256 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 20727256256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26195731200).

20727256256 is an abundant number, since it is smaller than the sum of its proper divisors (31664206144).

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

20727256256 is a wasteful number, since it uses less digits than its factorization.

20727256256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143294 (or 143284 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 20727256256 in words is "twenty billion, seven hundred twenty-seven million, two hundred fifty-six thousand, two hundred fifty-six".