203122320330 has 64 divisors (see below), whose sum is σ = 496838251008. Its totient is φ = 53128258560.

The previous prime is 203122320307. The next prime is 203122320377. The reversal of 203122320330 is 33023221302.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203122320297 and 203122320306.

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, 5963007 + ... + 5996973.

It is an arithmetic number, because the mean of its divisors is an integer number (7763097672).

Almost surely, 2^203122320330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203122320330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248419125504).

203122320330 is an abundant number, since it is smaller than the sum of its proper divisors (293715930678).

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

203122320330 is a wasteful number, since it uses less digits than its factorization.

203122320330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37791.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 203122320330 its reverse (33023221302), we get a palindrome (236145541632).

The spelling of 203122320330 in words is "two hundred three billion, one hundred twenty-two million, three hundred twenty thousand, three hundred thirty".