18958367219 has 32 divisors (see below), whose sum is σ = 21990044160. Its totient is φ = 16163884800.

The previous prime is 18958367213. The next prime is 18958367227. The reversal of 18958367219 is 91276385981.

It is a cyclic number.

It is not a de Polignac number, because 18958367219 - 2⁴ = 18958367203 is a prime.

It is a super-2 number, since 2×18958367219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18958367213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9806777 + ... + 9808709.

It is an arithmetic number, because the mean of its divisors is an integer number (687188880).

Almost surely, 2^18958367219 is an apocalyptic number.

18958367219 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18958367219 is a deficient number, since it is larger than the sum of its proper divisors (3031676941).

18958367219 is a wasteful number, since it uses less digits than its factorization.

18958367219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411.

The product of its digits is 6531840, while the sum is 59.

The spelling of 18958367219 in words is "eighteen billion, nine hundred fifty-eight million, three hundred sixty-seven thousand, two hundred nineteen".