13506808939 has 16 divisors (see below), whose sum is σ = 15315713280. Its totient is φ = 11808266400.

The previous prime is 13506808933. The next prime is 13506808943. The reversal of 13506808939 is 93980860531.

It is a cyclic number.

It is not a de Polignac number, because 13506808939 - 2¹¹ = 13506806891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13506808933) 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, 1325514 + ... + 1335664.

It is an arithmetic number, because the mean of its divisors is an integer number (957232080).

Almost surely, 2^13506808939 is an apocalyptic number.

13506808939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13506808939 is a deficient number, since it is larger than the sum of its proper divisors (1808904341).

13506808939 is a wasteful number, since it uses less digits than its factorization.

13506808939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15570.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 13506808939 in words is "thirteen billion, five hundred six million, eight hundred eight thousand, nine hundred thirty-nine".