20576 has 12 divisors (see below), whose sum is σ = 40572. Its totient is φ = 10272.

The previous prime is 20563. The next prime is 20593. The reversal of 20576 is 67502.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290 + ... + 353.

It is an arithmetic number, because the mean of its divisors is an integer number (3381).

2²⁰⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

20576 is a deficient number, since it is larger than the sum of its proper divisors (19996).

20576 is an equidigital number, since it uses as much as digits as its factorization.

20576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20576 is about 143.4433686163. The cubic root of 20576 is about 27.4022979230.

The spelling of 20576 in words is "twenty thousand, five hundred seventy-six".