18135195408 has 120 divisors (see below), whose sum is σ = 57217344800. Its totient is φ = 5495497920.

The previous prime is 18135195401. The next prime is 18135195427. The reversal of 18135195408 is 80459153181.

18135195408 is a `hidden beast` number, since 1 + 81 + 3 + 519 + 54 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18135195401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121198 + ... + 225741.

Almost surely, 2^18135195408 is an apocalyptic number.

18135195408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18135195408 is an abundant number, since it is smaller than the sum of its proper divisors (39082149392).

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

18135195408 is a wasteful number, since it uses less digits than its factorization.

18135195408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346978 (or 346955 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 18135195408 in words is "eighteen billion, one hundred thirty-five million, one hundred ninety-five thousand, four hundred eight".