18108324621965 has 8 divisors (see below), whose sum is σ = 22192329749760. Its totient is φ = 14178432895312.

The previous prime is 18108324621911. The next prime is 18108324621979. The reversal of 18108324621965 is 56912642380181.

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 18108324621965 - 2⁶ = 18108324621901 is a prime.

It is a super-2 number, since 2×18108324621965² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18108324621965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38528350025 + ... + 38528350494.

It is an arithmetic number, because the mean of its divisors is an integer number (2774041218720).

Almost surely, 2^{18108324621965} is an apocalyptic number.

It is an amenable number.

18108324621965 is a deficient number, since it is larger than the sum of its proper divisors (4084005127795).

18108324621965 is an equidigital number, since it uses as much as digits as its factorization.

18108324621965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77056700571.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 18108324621965 in words is "eighteen trillion, one hundred eight billion, three hundred twenty-four million, six hundred twenty-one thousand, nine hundred sixty-five".