17421023218 has 8 divisors (see below), whose sum is σ = 26446372848. Its totient is φ = 8605565604.

The previous prime is 17421023171. The next prime is 17421023227. The reversal of 17421023218 is 81232012471.

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

It is a self number, because there is not a number n which added to its sum of digits gives 17421023218.

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, 52472796 + ... + 52473127.

It is an arithmetic number, because the mean of its divisors is an integer number (3305796606).

Almost surely, 2^17421023218 is an apocalyptic number.

17421023218 is a deficient number, since it is larger than the sum of its proper divisors (9025349630).

17421023218 is a wasteful number, since it uses less digits than its factorization.

17421023218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104946008.

The product of its (nonzero) digits is 5376, while the sum is 31.

Adding to 17421023218 its reverse (81232012471), we get a palindrome (98653035689).

The spelling of 17421023218 in words is "seventeen billion, four hundred twenty-one million, twenty-three thousand, two hundred eighteen".