13031051905 has 24 divisors (see below), whose sum is σ = 16684806528. Its totient is φ = 9768146688.

The previous prime is 13031051863. The next prime is 13031051921. The reversal of 13031051905 is 50915013031.

It is not a de Polignac number, because 13031051905 - 2²⁷ = 12896834177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308152 + ... + 347878.

It is an arithmetic number, because the mean of its divisors is an integer number (695200272).

Almost surely, 2^13031051905 is an apocalyptic number.

It is an amenable number.

13031051905 is a deficient number, since it is larger than the sum of its proper divisors (3653754623).

13031051905 is a wasteful number, since it uses less digits than its factorization.

13031051905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39993 (or 39976 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 28.

Adding to 13031051905 its reverse (50915013031), we get a palindrome (63946064936).

The spelling of 13031051905 in words is "thirteen billion, thirty-one million, fifty-one thousand, nine hundred five".