18117975460 has 48 divisors (see below), whose sum is σ = 41203512000. Its totient is φ = 6652324224.

The previous prime is 18117975439. The next prime is 18117975479. The reversal of 18117975460 is 6457971181.

It is a super-2 number, since 2×18117975460² (a number of 21 digits) contains 22 as substring.

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, 148110 + ... + 241189.

It is an arithmetic number, because the mean of its divisors is an integer number (858406500).

Almost surely, 2^18117975460 is an apocalyptic number.

18117975460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18117975460 is an abundant number, since it is smaller than the sum of its proper divisors (23085536540).

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

18117975460 is a wasteful number, since it uses less digits than its factorization.

18117975460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389500 (or 389498 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 18117975460 in words is "eighteen billion, one hundred seventeen million, nine hundred seventy-five thousand, four hundred sixty".