13971921352 has 16 divisors (see below), whose sum is σ = 26905389660. Its totient is φ = 6797150784.

The previous prime is 13971921349. The next prime is 13971921361. The reversal of 13971921352 is 25312917931.

It can be written as a sum of positive squares in 2 ways, for example, as 12044184516 + 1927736836 = 109746^2 + 43906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13971921299 and 13971921308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23600923 + ... + 23601514.

Almost surely, 2^13971921352 is an apocalyptic number.

It is an amenable number.

13971921352 is a deficient number, since it is larger than the sum of its proper divisors (12933468308).

13971921352 is a wasteful number, since it uses less digits than its factorization.

13971921352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47202480 (or 47202476 counting only the distinct ones).

The product of its digits is 102060, while the sum is 43.

The spelling of 13971921352 in words is "thirteen billion, nine hundred seventy-one million, nine hundred twenty-one thousand, three hundred fifty-two".