20215056 has 20 divisors (see below), whose sum is σ = 52222352. Its totient is φ = 6738336.

The previous prime is 20215037. The next prime is 20215093. The reversal of 20215056 is 65051202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210526 + ... + 210621.

Almost surely, 2^20215056 is an apocalyptic number.

It is an amenable number.

20215056 is an abundant number, since it is smaller than the sum of its proper divisors (32007296).

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

20215056 is a wasteful number, since it uses less digits than its factorization.

20215056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421158 (or 421152 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20215056 is about 4496.1156568754. The cubic root of 20215056 is about 272.4112147979.

Adding to 20215056 its reverse (65051202), we get a palindrome (85266258).

The spelling of 20215056 in words is "twenty million, two hundred fifteen thousand, fifty-six".