20888256 has 28 divisors (see below), whose sum is σ = 55267352. Its totient is φ = 6962688.

The previous prime is 20888251. The next prime is 20888279. The reversal of 20888256 is 65288802.

It is not an unprimeable number, because it can be changed into a prime (20888251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54205 + ... + 54588.

It is an arithmetic number, because the mean of its divisors is an integer number (1973834).

Almost surely, 2^20888256 is an apocalyptic number.

It is an amenable number.

20888256 is an abundant number, since it is smaller than the sum of its proper divisors (34379096).

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

20888256 is a wasteful number, since it uses less digits than its factorization.

20888256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108808 (or 108798 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 20888256 is about 4570.3671624936. The cubic root of 20888256 is about 275.4021927658.

The spelling of 20888256 in words is "twenty million, eight hundred eighty-eight thousand, two hundred fifty-six".