13508234509 has 16 divisors (see below), whose sum is σ = 17727828480. Its totient is φ = 9971901360.

The previous prime is 13508234491. The next prime is 13508234543. The reversal of 13508234509 is 90543280531.

It is a cyclic number.

It is not a de Polignac number, because 13508234509 - 2¹¹ = 13508232461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13508231509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4615159 + ... + 4618084.

It is an arithmetic number, because the mean of its divisors is an integer number (1107989280).

Almost surely, 2^13508234509 is an apocalyptic number.

13508234509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13508234509 is a deficient number, since it is larger than the sum of its proper divisors (4219593971).

13508234509 is a wasteful number, since it uses less digits than its factorization.

13508234509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9233280.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 13508234509 in words is "thirteen billion, five hundred eight million, two hundred thirty-four thousand, five hundred nine".