20234256 has 80 divisors (see below), whose sum is σ = 61008000. Its totient is φ = 5776512.

The previous prime is 20234251. The next prime is 20234281. The reversal of 20234256 is 65243202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20234251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15850 + ... + 17078.

It is an arithmetic number, because the mean of its divisors is an integer number (762600).

Almost surely, 2^20234256 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 20234256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30504000).

20234256 is an abundant number, since it is smaller than the sum of its proper divisors (40773744).

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

20234256 is a wasteful number, since it uses less digits than its factorization.

20234256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20234256 is about 4498.2503265159. The cubic root of 20234256 is about 272.4974317296.

Adding to 20234256 its reverse (65243202), we get a palindrome (85477458).

The spelling of 20234256 in words is "twenty million, two hundred thirty-four thousand, two hundred fifty-six".