20303856 has 120 divisors (see below), whose sum is σ = 61610640. Its totient is φ = 6220800.

The previous prime is 20303809. The next prime is 20303887. The reversal of 20303856 is 65830302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112086 + ... + 112266.

It is an arithmetic number, because the mean of its divisors is an integer number (513422).

Almost surely, 2^20303856 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 20303856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30805320).

20303856 is an abundant number, since it is smaller than the sum of its proper divisors (41306784).

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

20303856 is a wasteful number, since it uses less digits than its factorization.

20303856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20303856 is about 4505.9800265869. The cubic root of 20303856 is about 272.8095116838.

It can be divided in two parts, 2030 and 3856, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 20303856 in words is "twenty million, three hundred three thousand, eight hundred fifty-six".