18379407984138 has 12 divisors (see below), whose sum is σ = 39822050632338. Its totient is φ = 6126469328040.

The previous prime is 18379407984083. The next prime is 18379407984139. The reversal of 18379407984138 is 83148970497381.

18379407984138 is a `hidden beast` number, since 1 + 8 + 3 + 7 + 9 + 407 + 9 + 84 + 138 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17661451717809 + 717956266329 = 4202553^2 + 847323^2 .

It is not an unprimeable number, because it can be changed into a prime (18379407984139) 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, 510539110653 + ... + 510539110688.

Almost surely, 2^{18379407984138} is an apocalyptic number.

18379407984138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18379407984138 is an abundant number, since it is smaller than the sum of its proper divisors (21442642648200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18379407984138 is a wasteful number, since it uses less digits than its factorization.

18379407984138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021078221349 (or 1021078221346 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 72.

The spelling of 18379407984138 in words is "eighteen trillion, three hundred seventy-nine billion, four hundred seven million, nine hundred eighty-four thousand, one hundred thirty-eight".