13185421418 has 8 divisors (see below), whose sum is σ = 21299526948. Its totient is φ = 6085579104.

The previous prime is 13185421397. The next prime is 13185421429. The reversal of 13185421418 is 81412458131.

It can be written as a sum of positive squares in 2 ways, for example, as 9514636849 + 3670784569 = 97543^2 + 60587^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253565771 + ... + 253565822.

Almost surely, 2^13185421418 is an apocalyptic number.

13185421418 is a deficient number, since it is larger than the sum of its proper divisors (8114105530).

13185421418 is a wasteful number, since it uses less digits than its factorization.

13185421418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507131608.

The product of its digits is 30720, while the sum is 38.

Adding to 13185421418 its reverse (81412458131), we get a palindrome (94597879549).

The spelling of 13185421418 in words is "thirteen billion, one hundred eighty-five million, four hundred twenty-one thousand, four hundred eighteen".