18355326413 has 8 divisors (see below), whose sum is σ = 18579288000. Its totient is φ = 18131431968.

The previous prime is 18355326397. The next prime is 18355326427. The reversal of 18355326413 is 31462355381.

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 18355326413 - 2⁴ = 18355326397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18355326443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738848 + ... + 763286.

It is an arithmetic number, because the mean of its divisors is an integer number (2322411000).

Almost surely, 2^18355326413 is an apocalyptic number.

It is an amenable number.

18355326413 is a deficient number, since it is larger than the sum of its proper divisors (223961587).

18355326413 is an equidigital number, since it uses as much as digits as its factorization.

18355326413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33571.

The product of its digits is 259200, while the sum is 41.

The spelling of 18355326413 in words is "eighteen billion, three hundred fifty-five million, three hundred twenty-six thousand, four hundred thirteen".