18394515219 has 8 divisors (see below), whose sum is σ = 25968727440. Its totient is φ = 11541656576.

The previous prime is 18394515211. The next prime is 18394515263. The reversal of 18394515219 is 91251549381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18394515219 - 2³ = 18394515211 is a prime.

It is a super-2 number, since 2×18394515219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18394515211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180338334 + ... + 180338435.

It is an arithmetic number, because the mean of its divisors is an integer number (3246090930).

Almost surely, 2^18394515219 is an apocalyptic number.

18394515219 is a deficient number, since it is larger than the sum of its proper divisors (7574212221).

18394515219 is a wasteful number, since it uses less digits than its factorization.

18394515219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360676789.

The product of its digits is 388800, while the sum is 48.

The spelling of 18394515219 in words is "eighteen billion, three hundred ninety-four million, five hundred fifteen thousand, two hundred nineteen".