203421303442320 has 160 divisors (see below), whose sum is σ = 639523386728832. Its totient is φ = 53479245828096.

The previous prime is 203421303442271. The next prime is 203421303442397. The reversal of 203421303442320 is 23244303124302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37641567 + ... + 42705153.

Almost surely, 2^{203421303442320} is an apocalyptic number.

203421303442320 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 203421303442320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319761693364416).

203421303442320 is an abundant number, since it is smaller than the sum of its proper divisors (436102083286512).

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

203421303442320 is a wasteful number, since it uses less digits than its factorization.

203421303442320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065969 (or 5065963 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 203421303442320 its reverse (23244303124302), we get a palindrome (226665606566622).

The spelling of 203421303442320 in words is "two hundred three trillion, four hundred twenty-one billion, three hundred three million, four hundred forty-two thousand, three hundred twenty".