20338256 has 40 divisors (see below), whose sum is σ = 43550784. Its totient is φ = 9152000.

The previous prime is 20338247. The next prime is 20338259. The reversal of 20338256 is 65283302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4631 + ... + 7881.

Almost surely, 2^20338256 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 20338256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21775392).

20338256 is an abundant number, since it is smaller than the sum of its proper divisors (23212528).

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

20338256 is a wasteful number, since it uses less digits than its factorization.

20338256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20338256 is about 4509.7955607766. The cubic root of 20338256 is about 272.9634947856.

The spelling of 20338256 in words is "twenty million, three hundred thirty-eight thousand, two hundred fifty-six".