18423132432 has 120 divisors (see below), whose sum is σ = 48815313120. Its totient is φ = 5986506240.

The previous prime is 18423132391. The next prime is 18423132439. The reversal of 18423132432 is 23423132481.

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

Its product of digits (27648) is a multiple of the sum of its prime divisors (864).

It is a junction number, because it is equal to n+sod(n) for n = 18423132393 and 18423132402.

It is not an unprimeable number, because it can be changed into a prime (18423132439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26661207 + ... + 26661897.

It is an arithmetic number, because the mean of its divisors is an integer number (406794276).

Almost surely, 2^18423132432 is an apocalyptic number.

18423132432 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 18423132432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24407656560).

18423132432 is an abundant number, since it is smaller than the sum of its proper divisors (30392180688).

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

18423132432 is an equidigital number, since it uses as much as digits as its factorization.

18423132432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 864 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The spelling of 18423132432 in words is "eighteen billion, four hundred twenty-three million, one hundred thirty-two thousand, four hundred thirty-two".