203311323204 has 96 divisors (see below), whose sum is σ = 543598110720. Its totient is φ = 58540416000.

The previous prime is 203311323179. The next prime is 203311323263. The reversal of 203311323204 is 402323113302.

It is a super-2 number, since 2×203311323204² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 236692 + ... + 680180.

It is an arithmetic number, because the mean of its divisors is an integer number (5662480320).

Almost surely, 2^203311323204 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 203311323204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271799055360).

203311323204 is an abundant number, since it is smaller than the sum of its proper divisors (340286787516).

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

203311323204 is a wasteful number, since it uses less digits than its factorization.

203311323204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443681 (or 443679 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 203311323204 its reverse (402323113302), we get a palindrome (605634436506).

The spelling of 203311323204 in words is "two hundred three billion, three hundred eleven million, three hundred twenty-three thousand, two hundred four".