It is a happy number.
20425 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.
20425 is a lucky number.
It is a plaindrome in base 7.
It is an unprimeable number.
220425 is an apocalyptic number.
20425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
20425 is a wasteful number, since it uses less digits than its factorization.
20425 is an odious number, because the sum of its binary digits is odd.
The square root of 20425 is about 142.9160592796. The cubic root of 20425 is about 27.3351013464.
Adding to 20425 its reverse (52402), we get a palindrome (72827).
The spelling of 20425 in words is "twenty thousand, four hundred twenty-five".