203312323220 has 48 divisors (see below), whose sum is σ = 434379456000. Its totient is φ = 79912103040.

The previous prime is 203312323213. The next prime is 203312323337. The reversal of 203312323220 is 22323213302.

It is a super-2 number, since 2×203312323220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2794910 + ... + 2866730.

It is an arithmetic number, because the mean of its divisors is an integer number (9049572000).

Almost surely, 2^203312323220 is an apocalyptic number.

203312323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203312323220 is an abundant number, since it is smaller than the sum of its proper divisors (231067132780).

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

203312323220 is a wasteful number, since it uses less digits than its factorization.

203312323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74288 (or 74286 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 203312323220 its reverse (22323213302), we get a palindrome (225635536522).

The spelling of 203312323220 in words is "two hundred three billion, three hundred twelve million, three hundred twenty-three thousand, two hundred twenty".