18117657124 has 12 divisors (see below), whose sum is σ = 36235314304. Its totient is φ = 7764710184.

The previous prime is 18117657101. The next prime is 18117657127. The reversal of 18117657124 is 42175671181.

18117657124 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18117657127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323529564 + ... + 323529619.

Almost surely, 2^18117657124 is an apocalyptic number.

18117657124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18117657124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18117657124 is a wasteful number, since it uses less digits than its factorization.

18117657124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647059194 (or 647059192 counting only the distinct ones).

The product of its digits is 94080, while the sum is 43.

The spelling of 18117657124 in words is "eighteen billion, one hundred seventeen million, six hundred fifty-seven thousand, one hundred twenty-four".