13109520 has 40 divisors (see below), whose sum is σ = 40640256. Its totient is φ = 3495808.

The previous prime is 13109513. The next prime is 13109521. The reversal of 13109520 is 2590131.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (13109521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27072 + ... + 27551.

Almost surely, 2^13109520 is an apocalyptic number.

13109520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13109520 is an abundant number, since it is smaller than the sum of its proper divisors (27530736).

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

13109520 is a wasteful number, since it uses less digits than its factorization.

13109520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54639 (or 54633 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 13109520 is about 3620.7071132584. The cubic root of 13109520 is about 235.7919261487.

Adding to 13109520 its reverse (2590131), we get a palindrome (15699651).

The spelling of 13109520 in words is "thirteen million, one hundred nine thousand, five hundred twenty".