20576256 has 96 divisors (see below), whose sum is σ = 58378320. Its totient is φ = 6422528.

The previous prime is 20576251. The next prime is 20576267. The reversal of 20576256 is 65267502.

20576256 = T₃₅₅ + T₃₅₆ + ... + T₅₅₁.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20576251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104350 + ... + 104546.

Almost surely, 2^20576256 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 20576256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29189160).

20576256 is an abundant number, since it is smaller than the sum of its proper divisors (37802064).

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

20576256 is a wasteful number, since it uses less digits than its factorization.

20576256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20576256 is about 4536.1058188715. The cubic root of 20576256 is about 274.0241156603.

The spelling of 20576256 in words is "twenty million, five hundred seventy-six thousand, two hundred fifty-six".