13234891805 has 8 divisors (see below), whose sum is σ = 15886021632. Its totient is φ = 10585145808.

The previous prime is 13234891801. The next prime is 13234891829. The reversal of 13234891805 is 50819843231.

13234891805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13234891805 - 2² = 13234891801 is a prime.

It is a super-2 number, since 2×13234891805² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13234891801) 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 7 ways as a sum of consecutive naturals, for example, 324797 + ... + 363266.

It is an arithmetic number, because the mean of its divisors is an integer number (1985752704).

Almost surely, 2^13234891805 is an apocalyptic number.

It is an amenable number.

13234891805 is a deficient number, since it is larger than the sum of its proper divisors (2651129827).

13234891805 is an equidigital number, since it uses as much as digits as its factorization.

13234891805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691915.

The product of its (nonzero) digits is 207360, while the sum is 44.

Adding to 13234891805 its sum of digits (44), we get a square (13234891849 = 115043²).

The spelling of 13234891805 in words is "thirteen billion, two hundred thirty-four million, eight hundred ninety-one thousand, eight hundred five".