13135202520 has 64 divisors (see below), whose sum is σ = 42987939840. Its totient is φ = 3184291200.

The previous prime is 13135202519. The next prime is 13135202537. The reversal of 13135202520 is 2520253131.

It is a happy number.

13135202520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4974136 + ... + 4976775.

It is an arithmetic number, because the mean of its divisors is an integer number (671686560).

Almost surely, 2^13135202520 is an apocalyptic number.

13135202520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13135202520 is an abundant number, since it is smaller than the sum of its proper divisors (29852737320).

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

13135202520 is a wasteful number, since it uses less digits than its factorization.

13135202520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9950936 (or 9950932 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 13135202520 its reverse (2520253131), we get a palindrome (15655455651).

The spelling of 13135202520 in words is "thirteen billion, one hundred thirty-five million, two hundred two thousand, five hundred twenty".