17944315418 has 4 divisors (see below), whose sum is σ = 26916473130. Its totient is φ = 8972157708.

The previous prime is 17944315399. The next prime is 17944315451. The reversal of 17944315418 is 81451344971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15621750169 + 2322565249 = 124987^2 + 48193^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4486078853 + ... + 4486078856.

Almost surely, 2^17944315418 is an apocalyptic number.

17944315418 is a deficient number, since it is larger than the sum of its proper divisors (8972157712).

17944315418 is an equidigital number, since it uses as much as digits as its factorization.

17944315418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972157711.

The product of its digits is 483840, while the sum is 47.

The spelling of 17944315418 in words is "seventeen billion, nine hundred forty-four million, three hundred fifteen thousand, four hundred eighteen".