203013320 has 128 divisors (see below), whose sum is σ = 508083840. Its totient is φ = 72683520.

The previous prime is 203013319. The next prime is 203013323. The reversal of 203013320 is 23310302.

It is a junction number, because it is equal to n+sod(n) for n = 203013295 and 203013304.

It is not an unprimeable number, because it can be changed into a prime (203013323) 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 31 ways as a sum of consecutive naturals, for example, 1549655 + ... + 1549785.

It is an arithmetic number, because the mean of its divisors is an integer number (3969405).

Almost surely, 2^203013320 is an apocalyptic number.

203013320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254041920).

203013320 is an abundant number, since it is smaller than the sum of its proper divisors (305070520).

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

203013320 is a wasteful number, since it uses less digits than its factorization.

203013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 203013320 is about 14248.2742814700. The cubic root of 203013320 is about 587.7259200538.

Adding to 203013320 its reverse (23310302), we get a palindrome (226323622).

The spelling of 203013320 in words is "two hundred three million, thirteen thousand, three hundred twenty".