18117468432 has 120 divisors (see below), whose sum is σ = 58000404800. Its totient is φ = 5171662080.

The previous prime is 18117468403. The next prime is 18117468443. The reversal of 18117468432 is 23486471181.

18117468432 is a `hidden beast` number, since 181 + 1 + 7 + 468 + 4 + 3 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1172694 + ... + 1188042.

Almost surely, 2^18117468432 is an apocalyptic number.

18117468432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18117468432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29000202400).

18117468432 is an abundant number, since it is smaller than the sum of its proper divisors (39882936368).

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

18117468432 is a wasteful number, since it uses less digits than its factorization.

18117468432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16541 (or 16532 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 18117468432 in words is "eighteen billion, one hundred seventeen million, four hundred sixty-eight thousand, four hundred thirty-two".