It is an unprimeable number.
Almost surely, 219782180 is an apocalyptic number.
19782180 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 19782180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33388992).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
19782180 is a wasteful number, since it uses less digits than its factorization.
19782180 is an evil number, because the sum of its binary digits is even.
The square root of 19782180 is about 4447.7162679290. The cubic root of 19782180 is about 270.4527383624.
The spelling of 19782180 in words is "nineteen million, seven hundred eighty-two thousand, one hundred eighty".