20960256 has 44 divisors (see below), whose sum is σ = 55874912. Its totient is φ = 6985728.

The previous prime is 20960197. The next prime is 20960263. The reversal of 20960256 is 65206902.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 340 + ... + 6483.

Almost surely, 2^20960256 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 20960256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27937456).

20960256 is an abundant number, since it is smaller than the sum of its proper divisors (34914656).

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

20960256 is an equidigital number, since it uses as much as digits as its factorization.

20960256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846 (or 6828 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20960256 is about 4578.2372153483. The cubic root of 20960256 is about 275.7182590203.

The spelling of 20960256 in words is "twenty million, nine hundred sixty thousand, two hundred fifty-six".