Adding to 20460 its reverse (6402), we get a palindrome (26862).
20460 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.
It is a nialpdrome in base 12.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20460.
It is an unprimeable number.
220460 is an apocalyptic number.
20460 is a gapful number since it is divisible by the number (20) 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 20460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32256).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20460 is a wasteful number, since it uses less digits than its factorization.
20460 is an evil number, because the sum of its binary digits is even.
The square root of 20460 is about 143.0384563675. The cubic root of 20460 is about 27.3507061214.
The spelling of 20460 in words is "twenty thousand, four hundred sixty".