17985390814 has 8 divisors (see below), whose sum is σ = 27021812688. Its totient is φ = 8978119920.

The previous prime is 17985390793. The next prime is 17985390821. The reversal of 17985390814 is 41809358971.

It is a happy number.

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

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 7286202 + ... + 7288669.

It is an arithmetic number, because the mean of its divisors is an integer number (3377726586).

Almost surely, 2^17985390814 is an apocalyptic number.

17985390814 is a deficient number, since it is larger than the sum of its proper divisors (9036421874).

17985390814 is a wasteful number, since it uses less digits than its factorization.

17985390814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14575490.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 17985390814 in words is "seventeen billion, nine hundred eighty-five million, three hundred ninety thousand, eight hundred fourteen".