13133205520 has 20 divisors (see below), whose sum is σ = 30534703020. Its totient is φ = 5253282176.

The previous prime is 13133205457. The next prime is 13133205539. The reversal of 13133205520 is 2550233131.

It can be written as a sum of positive squares in 2 ways, for example, as 7487787024 + 5645418496 = 86532^2 + 75136^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82082455 + ... + 82082614.

It is an arithmetic number, because the mean of its divisors is an integer number (1526735151).

Almost surely, 2^13133205520 is an apocalyptic number.

13133205520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13133205520 is an abundant number, since it is smaller than the sum of its proper divisors (17401497500).

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

13133205520 is a wasteful number, since it uses less digits than its factorization.

13133205520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164165082 (or 164165076 counting only the distinct ones).

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

Adding to 13133205520 its reverse (2550233131), we get a palindrome (15683438651).

The spelling of 13133205520 in words is "thirteen billion, one hundred thirty-three million, two hundred five thousand, five hundred twenty".