18135329868 has 48 divisors (see below), whose sum is σ = 47280240000. Its totient is φ = 6011331984.

The previous prime is 18135329843. The next prime is 18135329881. The reversal of 18135329868 is 86892353181.

18135329868 is a `hidden beast` number, since 1 + 8 + 13 + 532 + 98 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449718 + ... + 488381.

It is an arithmetic number, because the mean of its divisors is an integer number (985005000).

Almost surely, 2^18135329868 is an apocalyptic number.

18135329868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18135329868 is an abundant number, since it is smaller than the sum of its proper divisors (29144910132).

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

18135329868 is a wasteful number, since it uses less digits than its factorization.

18135329868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938291 (or 938283 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 18135329868 in words is "eighteen billion, one hundred thirty-five million, three hundred twenty-nine thousand, eight hundred sixty-eight".