13811910731 has 4 divisors (see below), whose sum is σ = 13840272432. Its totient is φ = 13783549032.

The previous prime is 13811910713. The next prime is 13811910733. The reversal of 13811910731 is 13701911831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13811910731 - 2²⁶ = 13744801867 is a prime.

It is a super-2 number, since 2×13811910731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13811910691 and 13811910700.

It is not an unprimeable number, because it can be changed into a prime (13811910733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14180120 + ... + 14181093.

It is an arithmetic number, because the mean of its divisors is an integer number (3460068108).

Almost surely, 2^13811910731 is an apocalyptic number.

13811910731 is a deficient number, since it is larger than the sum of its proper divisors (28361701).

13811910731 is an equidigital number, since it uses as much as digits as its factorization.

13811910731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28361700.

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 13811910731 in words is "thirteen billion, eight hundred eleven million, nine hundred ten thousand, seven hundred thirty-one".