It is a congruent number.
It is an unprimeable number.
Almost surely, 218412380 is an apocalyptic number.
18412380 is a gapful number since it is divisible by the number (10) 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 18412380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32739840).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18412380 is a wasteful number, since it uses less digits than its factorization.
18412380 is an odious number, because the sum of its binary digits is odd.
The square root of 18412380 is about 4290.9649264472. The cubic root of 18412380 is about 264.0604200553.
The spelling of 18412380 in words is "eighteen million, four hundred twelve thousand, three hundred eighty".