18135242712 has 64 divisors (see below), whose sum is σ = 50428137600. Its totient is φ = 6038785440.

The previous prime is 18135242707. The next prime is 18135242729. The reversal of 18135242712 is 21724253181.

18135242712 is a `hidden beast` number, since 181 + 3 + 52 + 427 + 1 + 2 = 666.

It is a super-3 number, since 3×18135242712³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166503 + ... + 252969.

It is an arithmetic number, because the mean of its divisors is an integer number (787939650).

Almost surely, 2^18135242712 is an apocalyptic number.

18135242712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18135242712 is an abundant number, since it is smaller than the sum of its proper divisors (32292894888).

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

18135242712 is a wasteful number, since it uses less digits than its factorization.

18135242712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87453 (or 87443 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

Adding to 18135242712 its reverse (21724253181), we get a palindrome (39859495893).

The spelling of 18135242712 in words is "eighteen billion, one hundred thirty-five million, two hundred forty-two thousand, seven hundred twelve".