13203312320 has 112 divisors (see below), whose sum is σ = 34337841408. Its totient is φ = 4795714560.

The previous prime is 13203312313. The next prime is 13203312341. The reversal of 13203312320 is 2321330231.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13203312292 and 13203312301.

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, 4303427 + ... + 4306493.

Almost surely, 2^13203312320 is an apocalyptic number.

13203312320 is a gapful number since it is divisible by the number (10) 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 13203312320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17168920704).

13203312320 is an abundant number, since it is smaller than the sum of its proper divisors (21134529088).

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

13203312320 is a wasteful number, since it uses less digits than its factorization.

13203312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318 (or 4308 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 13203312320 its reverse (2321330231), we get a palindrome (15524642551).

It can be divided in two parts, 13203 and 312320, that added together give a palindrome (325523).

The spelling of 13203312320 in words is "thirteen billion, two hundred three million, three hundred twelve thousand, three hundred twenty".