18332171136 has 192 divisors, whose sum is σ = 56625397920. Its totient is φ = 5672042496.

The previous prime is 18332171107. The next prime is 18332171149. The reversal of 18332171136 is 63117123381.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a self number, because there is not a number n which added to its sum of digits gives 18332171136.

It is a congruent number.

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, 1423221 + ... + 1436043.

Almost surely, 2^18332171136 is an apocalyptic number.

18332171136 is a gapful number since it is divisible by the number (16) 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 18332171136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28312698960).

18332171136 is an abundant number, since it is smaller than the sum of its proper divisors (38293226784).

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

18332171136 is a wasteful number, since it uses less digits than its factorization.

18332171136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12933 (or 12918 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The spelling of 18332171136 in words is "eighteen billion, three hundred thirty-two million, one hundred seventy-one thousand, one hundred thirty-six".