17999999998 has 16 divisors (see below), whose sum is σ = 27231014016. Its totient is φ = 8923224600.

The previous prime is 17999999989. The next prime is 18000000001. The reversal of 17999999998 is 89999999971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100965 + ... + 214927.

It is an arithmetic number, because the mean of its divisors is an integer number (1701938376).

Almost surely, 2^17999999998 is an apocalyptic number.

17999999998 is a deficient number, since it is larger than the sum of its proper divisors (9231014018).

17999999998 is a wasteful number, since it uses less digits than its factorization.

17999999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114639.

The product of its digits is 2410616376, while the sum is 88.

The spelling of 17999999998 in words is "seventeen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".