18318478419 has 6 divisors (see below), whose sum is σ = 26460024396. Its totient is φ = 12212318940.

The previous prime is 18318478393. The next prime is 18318478439. The reversal of 18318478419 is 91487481381.

18318478419 is a `hidden beast` number, since 1 + 83 + 1 + 84 + 78 + 419 = 666.

It is not a de Polignac number, because 18318478419 - 2⁹ = 18318477907 is a prime.

It is a super-2 number, since 2×18318478419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18318478439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1017693237 + ... + 1017693254.

It is an arithmetic number, because the mean of its divisors is an integer number (4410004066).

Almost surely, 2^18318478419 is an apocalyptic number.

18318478419 is a deficient number, since it is larger than the sum of its proper divisors (8141545977).

18318478419 is a wasteful number, since it uses less digits than its factorization.

18318478419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035386497 (or 2035386494 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 18318478419 in words is "eighteen billion, three hundred eighteen million, four hundred seventy-eight thousand, four hundred nineteen".