13105231236 has 36 divisors (see below), whose sum is σ = 33271793100. Its totient is φ = 4349331648.

The previous prime is 13105231213. The next prime is 13105231241. The reversal of 13105231236 is 63213250131.

13105231236 is a `hidden beast` number, since 1 + 3 + 10 + 523 + 123 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5898240000 + 7206991236 = 76800^2 + 84894^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 786591 + ... + 803078.

It is an arithmetic number, because the mean of its divisors is an integer number (924216475).

Almost surely, 2^13105231236 is an apocalyptic number.

It is an amenable number.

13105231236 is an abundant number, since it is smaller than the sum of its proper divisors (20166561864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13105231236 is a wasteful number, since it uses less digits than its factorization.

13105231236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589908 (or 1589903 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 13105231236 its reverse (63213250131), we get a palindrome (76318481367).

The spelling of 13105231236 in words is "thirteen billion, one hundred five million, two hundred thirty-one thousand, two hundred thirty-six".