203020321220 has 48 divisors (see below), whose sum is σ = 440190912000. Its totient is φ = 78571503360.

The previous prime is 203020321219. The next prime is 203020321223. The reversal of 203020321220 is 22123020302.

It is not an unprimeable number, because it can be changed into a prime (203020321223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3047831 + ... + 3113729.

It is an arithmetic number, because the mean of its divisors is an integer number (9170644000).

Almost surely, 2^203020321220 is an apocalyptic number.

203020321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203020321220 is an abundant number, since it is smaller than the sum of its proper divisors (237170590780).

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

203020321220 is a wasteful number, since it uses less digits than its factorization.

203020321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70908 (or 70906 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 203020321220 its reverse (22123020302), we get a palindrome (225143341522).

The spelling of 203020321220 in words is "two hundred three billion, twenty million, three hundred twenty-one thousand, two hundred twenty".