20303120 has 20 divisors (see below), whose sum is σ = 47204940. Its totient is φ = 8121216.

The previous prime is 20303119. The next prime is 20303123. The reversal of 20303120 is 2130302.

It can be written as a sum of positive squares in 2 ways, for example, as 11916304 + 8386816 = 3452^2 + 2896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (20303123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126815 + ... + 126974.

It is an arithmetic number, because the mean of its divisors is an integer number (2360247).

Almost surely, 2^20303120 is an apocalyptic number.

20303120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303120 is an abundant number, since it is smaller than the sum of its proper divisors (26901820).

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

20303120 is a wasteful number, since it uses less digits than its factorization.

20303120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253802 (or 253796 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20303120 is about 4505.8983565988. The cubic root of 20303120 is about 272.8062152619.

Adding to 20303120 its reverse (2130302), we get a palindrome (22433422).

The spelling of 20303120 in words is "twenty million, three hundred three thousand, one hundred twenty".