20250256 has 30 divisors (see below), whose sum is σ = 42490770. Its totient is φ = 9345024.

The previous prime is 20250239. The next prime is 20250271. The reversal of 20250256 is 65205202.

It can be written as a sum of positive squares in 3 ways, for example, as 256 + 20250000 = 16^2 + 4500^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1041 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (1416359).

Almost surely, 2^20250256 is an apocalyptic number.

20250256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20250256 is an abundant number, since it is smaller than the sum of its proper divisors (22240514).

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

20250256 is a wasteful number, since it uses less digits than its factorization.

20250256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523 (or 7504 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20250256 is about 4500.0284443545. The cubic root of 20250256 is about 272.5692375197.

Adding to 20250256 its reverse (65205202), we get a palindrome (85455458).

The spelling of 20250256 in words is "twenty million, two hundred fifty thousand, two hundred fifty-six".