13971949208 has 64 divisors (see below), whose sum is σ = 31006368000. Its totient is φ = 5775138432.

The previous prime is 13971949183. The next prime is 13971949253. The reversal of 13971949208 is 80294917931.

It is a Cunningham number, because it is equal to 118203²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 13971949208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650635 + ... + 1659077.

It is an arithmetic number, because the mean of its divisors is an integer number (484474500).

Almost surely, 2^13971949208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13971949208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15503184000).

13971949208 is an abundant number, since it is smaller than the sum of its proper divisors (17034418792).

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

13971949208 is a wasteful number, since it uses less digits than its factorization.

13971949208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504 (or 9500 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 13971949208 in words is "thirteen billion, nine hundred seventy-one million, nine hundred forty-nine thousand, two hundred eight".