17998944319 has 16 divisors (see below), whose sum is σ = 18552185568. Its totient is φ = 17454108672.

The previous prime is 17998944311. The next prime is 17998944349. The reversal of 17998944319 is 91344989971.

It is a cyclic number.

It is not a de Polignac number, because 17998944319 - 2³ = 17998944311 is a prime.

It is a super-2 number, since 2×17998944319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17998944311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4866679 + ... + 4870375.

It is an arithmetic number, because the mean of its divisors is an integer number (1159511598).

Almost surely, 2^17998944319 is an apocalyptic number.

17998944319 is a deficient number, since it is larger than the sum of its proper divisors (553241249).

17998944319 is an equidigital number, since it uses as much as digits as its factorization.

17998944319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794.

The product of its digits is 17635968, while the sum is 64.

The spelling of 17998944319 in words is "seventeen billion, nine hundred ninety-eight million, nine hundred forty-four thousand, three hundred nineteen".