20303568 has 80 divisors (see below), whose sum is σ = 59688640. Its totient is φ = 6604416.

The previous prime is 20303551. The next prime is 20303573. The reversal of 20303568 is 86530302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 18030 + ... + 19122.

It is an arithmetic number, because the mean of its divisors is an integer number (746108).

Almost surely, 2^20303568 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 20303568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29844320).

20303568 is an abundant number, since it is smaller than the sum of its proper divisors (39385072).

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

20303568 is a wasteful number, since it uses less digits than its factorization.

20303568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1141 counting only the distinct ones).

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

The square root of 20303568 is about 4505.9480689418. The cubic root of 20303568 is about 272.8082217891.

The spelling of 20303568 in words is "twenty million, three hundred three thousand, five hundred sixty-eight".