13911281205 has 24 divisors (see below), whose sum is σ = 23491192032. Its totient is φ = 7028855136.

The previous prime is 13911281191. The next prime is 13911281207. The reversal of 13911281205 is 50218211931.

It is not a de Polignac number, because 13911281205 - 2⁵ = 13911281173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13911281207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1279099 + ... + 1289928.

It is an arithmetic number, because the mean of its divisors is an integer number (978799668).

Almost surely, 2^13911281205 is an apocalyptic number.

13911281205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13911281205 is a deficient number, since it is larger than the sum of its proper divisors (9579910827).

13911281205 is a wasteful number, since it uses less digits than its factorization.

13911281205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569073 (or 2569054 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 13911281205 in words is "thirteen billion, nine hundred eleven million, two hundred eighty-one thousand, two hundred five".