13316721939 has 12 divisors (see below), whose sum is σ = 19467016296. Its totient is φ = 8770852512.

The previous prime is 13316721917. The next prime is 13316721941. The reversal of 13316721939 is 93912761331.

13316721939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13316721939 - 2¹⁷ = 13316590867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13316721894 and 13316721903.

It is not an unprimeable number, because it can be changed into a prime (13316721139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8912722 + ... + 8914215.

It is an arithmetic number, because the mean of its divisors is an integer number (1622251358).

Almost surely, 2^13316721939 is an apocalyptic number.

13316721939 is a deficient number, since it is larger than the sum of its proper divisors (6150294357).

13316721939 is a wasteful number, since it uses less digits than its factorization.

13316721939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17827026 (or 17827023 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The spelling of 13316721939 in words is "thirteen billion, three hundred sixteen million, seven hundred twenty-one thousand, nine hundred thirty-nine".