Adding to 12340020 its reverse (2004321), we get a palindrome (14344341).
12340020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is an unprimeable number.
Almost surely, 212340020 is an apocalyptic number.
12340020 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 12340020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21547008).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12340020 is a wasteful number, since it uses less digits than its factorization.
12340020 is an evil number, because the sum of its binary digits is even.
The square root of 12340020 is about 3512.8364607536. The cubic root of 12340020 is about 231.0851057264.
The spelling of 12340020 in words is "twelve million, three hundred forty thousand, twenty".