13238636387 has 4 divisors (see below), whose sum is σ = 13695141120. Its totient is φ = 12782131656.

The previous prime is 13238636351. The next prime is 13238636393. The reversal of 13238636387 is 78363683231.

13238636387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78363683231 = 97 ⋅807873023.

It is a cyclic number.

It is not a de Polignac number, because 13238636387 - 2¹² = 13238632291 is a prime.

It is a super-3 number, since 3×13238636387³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13238666387) 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 3 ways as a sum of consecutive naturals, for example, 228252323 + ... + 228252380.

It is an arithmetic number, because the mean of its divisors is an integer number (3423785280).

Almost surely, 2^13238636387 is an apocalyptic number.

13238636387 is a deficient number, since it is larger than the sum of its proper divisors (456504733).

13238636387 is an equidigital number, since it uses as much as digits as its factorization.

13238636387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456504732.

The product of its digits is 2612736, while the sum is 50.

The spelling of 13238636387 in words is "thirteen billion, two hundred thirty-eight million, six hundred thirty-six thousand, three hundred eighty-seven".