20303256 has 16 divisors (see below), whose sum is σ = 50758200. Its totient is φ = 6767744.

The previous prime is 20303251. The next prime is 20303279. The reversal of 20303256 is 65230302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303251) 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, 422961 + ... + 423008.

Almost surely, 2^20303256 is an apocalyptic number.

It is an amenable number.

20303256 is an abundant number, since it is smaller than the sum of its proper divisors (30454944).

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

20303256 is a wasteful number, since it uses less digits than its factorization.

20303256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845978 (or 845974 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 20303256 is about 4505.9134479038. The cubic root of 20303256 is about 272.8068243893.

Adding to 20303256 its reverse (65230302), we get a palindrome (85533558).

The spelling of 20303256 in words is "twenty million, three hundred three thousand, two hundred fifty-six".