13013245520 has 80 divisors (see below), whose sum is σ = 33030885888. Its totient is φ = 4728568320.

The previous prime is 13013245507. The next prime is 13013245537. The reversal of 13013245520 is 2554231031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 13013245520.

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, 1374242 + ... + 1383678.

Almost surely, 2^13013245520 is an apocalyptic number.

13013245520 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 13013245520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16515442944).

13013245520 is an abundant number, since it is smaller than the sum of its proper divisors (20017640368).

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

13013245520 is a wasteful number, since it uses less digits than its factorization.

13013245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028 (or 11022 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13013245520 its reverse (2554231031), we get a palindrome (15567476551).

The spelling of 13013245520 in words is "thirteen billion, thirteen million, two hundred forty-five thousand, five hundred twenty".