18136340219 has 4 divisors (see below), whose sum is σ = 18312421296. Its totient is φ = 17960259144.

The previous prime is 18136340207. The next prime is 18136340239. The reversal of 18136340219 is 91204363181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91204363181 = 241 ⋅378441341.

It is not a de Polignac number, because 18136340219 - 2⁴ = 18136340203 is a prime.

It is a super-2 number, since 2×18136340219² (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 (18136340239) 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 3 ways as a sum of consecutive naturals, for example, 88040384 + ... + 88040589.

It is an arithmetic number, because the mean of its divisors is an integer number (4578105324).

Almost surely, 2^18136340219 is an apocalyptic number.

18136340219 is a deficient number, since it is larger than the sum of its proper divisors (176081077).

18136340219 is a wasteful number, since it uses less digits than its factorization.

18136340219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176081076.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 18136340219 in words is "eighteen billion, one hundred thirty-six million, three hundred forty thousand, two hundred nineteen".