18129653872 has 40 divisors (see below), whose sum is σ = 38354835312. Its totient is φ = 8233152000.

The previous prime is 18129653869. The next prime is 18129653887. The reversal of 18129653872 is 27835692181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146122 + ... + 240022.

Almost surely, 2^18129653872 is an apocalyptic number.

It is an amenable number.

18129653872 is an abundant number, since it is smaller than the sum of its proper divisors (20225181440).

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

18129653872 is a wasteful number, since it uses less digits than its factorization.

18129653872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95017 (or 95011 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 52.

The spelling of 18129653872 in words is "eighteen billion, one hundred twenty-nine million, six hundred fifty-three thousand, eight hundred seventy-two".