13081864 has 16 divisors (see below), whose sum is σ = 24616620. Its totient is φ = 6517440.

The previous prime is 13081841. The next prime is 13081903. The reversal of 13081864 is 46818031.

It can be written as a sum of positive squares in 2 ways, for example, as 12659364 + 422500 = 3558^2 + 650^2 .

It is a super-2 number, since 2×13081864² = 342270331428992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447 + ... + 5134.

Almost surely, 2^13081864 is an apocalyptic number.

It is an amenable number.

13081864 is a deficient number, since it is larger than the sum of its proper divisors (11534756).

13081864 is a wasteful number, since it uses less digits than its factorization.

13081864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880 (or 5876 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 13081864 is about 3616.8859534135. The cubic root of 13081864 is about 235.6259995924.

Adding to 13081864 its reverse (46818031), we get a palindrome (59899895).

The spelling of 13081864 in words is "thirteen million, eighty-one thousand, eight hundred sixty-four".