18008397219 has 16 divisors (see below), whose sum is σ = 24172521120. Its totient is φ = 11924989440.

The previous prime is 18008397161. The next prime is 18008397223. The reversal of 18008397219 is 91279380081.

It is not a de Polignac number, because 18008397219 - 2¹³ = 18008389027 is a prime.

It is a super-2 number, since 2×18008397219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18008397289) 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, 1987339 + ... + 1996379.

It is an arithmetic number, because the mean of its divisors is an integer number (1510782570).

Almost surely, 2^18008397219 is an apocalyptic number.

18008397219 is a deficient number, since it is larger than the sum of its proper divisors (6164123901).

18008397219 is a wasteful number, since it uses less digits than its factorization.

18008397219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13430.

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 18008397219 in words is "eighteen billion, eight million, three hundred ninety-seven thousand, two hundred nineteen".