18489635219 has 4 divisors (see below), whose sum is σ = 20170511160. Its totient is φ = 16808759280.

The previous prime is 18489635207. The next prime is 18489635287. The reversal of 18489635219 is 91253698481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91253698481 = 11 ⋅8295790771.

It is a cyclic number.

It is not a de Polignac number, because 18489635219 - 2²⁴ = 18472858003 is a prime.

It is a super-2 number, since 2×18489635219² (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 (18489631219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840437954 + ... + 840437975.

It is an arithmetic number, because the mean of its divisors is an integer number (5042627790).

Almost surely, 2^18489635219 is an apocalyptic number.

18489635219 is a deficient number, since it is larger than the sum of its proper divisors (1680875941).

18489635219 is a wasteful number, since it uses less digits than its factorization.

18489635219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680875940.

The product of its digits is 3732480, while the sum is 56.

The spelling of 18489635219 in words is "eighteen billion, four hundred eighty-nine million, six hundred thirty-five thousand, two hundred nineteen".