20087256 has 192 divisors, whose sum is σ = 65664000. Its totient is φ = 5080320.

The previous prime is 20087231. The next prime is 20087269. The reversal of 20087256 is 65278002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 647961 + ... + 647991.

It is an arithmetic number, because the mean of its divisors is an integer number (342000).

Almost surely, 2^20087256 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 20087256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32832000).

20087256 is an abundant number, since it is smaller than the sum of its proper divisors (45576744).

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

20087256 is a wasteful number, since it uses less digits than its factorization.

20087256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20087256 is about 4481.8808551768. The cubic root of 20087256 is about 271.8359376829.

The spelling of 20087256 in words is "twenty million, eighty-seven thousand, two hundred fifty-six".