13205135320 has 64 divisors (see below), whose sum is σ = 32119053120. Its totient is φ = 4857153024.

The previous prime is 13205135309. The next prime is 13205135347. The reversal of 13205135320 is 2353150231.

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, 88482 + ... + 185038.

It is an arithmetic number, because the mean of its divisors is an integer number (501860205).

Almost surely, 2^13205135320 is an apocalyptic number.

13205135320 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 13205135320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16059526560).

13205135320 is an abundant number, since it is smaller than the sum of its proper divisors (18913917800).

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

13205135320 is a wasteful number, since it uses less digits than its factorization.

13205135320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96844 (or 96840 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 13205135320 its reverse (2353150231), we get a palindrome (15558285551).

The spelling of 13205135320 in words is "thirteen billion, two hundred five million, one hundred thirty-five thousand, three hundred twenty".