13936732809 has 4 divisors (see below), whose sum is σ = 18582310416. Its totient is φ = 9291155204.

The previous prime is 13936732783. The next prime is 13936732841. The reversal of 13936732809 is 90823763931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13936732809 - 2¹¹ = 13936730761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13936732879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322788799 + ... + 2322788804.

It is an arithmetic number, because the mean of its divisors is an integer number (4645577604).

Almost surely, 2^13936732809 is an apocalyptic number.

It is an amenable number.

13936732809 is a deficient number, since it is larger than the sum of its proper divisors (4645577607).

13936732809 is an equidigital number, since it uses as much as digits as its factorization.

13936732809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645577606.

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 13936732809 in words is "thirteen billion, nine hundred thirty-six million, seven hundred thirty-two thousand, eight hundred nine".