20206256 has 20 divisors (see below), whose sum is σ = 44742672. Its totient is φ = 8659776.

The previous prime is 20206247. The next prime is 20206271. The reversal of 20206256 is 65260202.

It is a happy number.

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, 90095 + ... + 90318.

Almost surely, 2^20206256 is an apocalyptic number.

It is an amenable number.

20206256 is an abundant number, since it is smaller than the sum of its proper divisors (24536416).

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

20206256 is a wasteful number, since it uses less digits than its factorization.

20206256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180428 (or 180422 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20206256 is about 4495.1369278366. The cubic root of 20206256 is about 272.3716804589.

Adding to 20206256 its reverse (65260202), we get a palindrome (85466458).

The spelling of 20206256 in words is "twenty million, two hundred six thousand, two hundred fifty-six".