20425230 has 128 divisors (see below), whose sum is σ = 63452160. Its totient is φ = 4579200.

The previous prime is 20425217. The next prime is 20425231. The reversal of 20425230 is 3252402.

20425230 is nontrivially palindromic in base 12.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 190837 + ... + 190943.

It is an arithmetic number, because the mean of its divisors is an integer number (495720).

Almost surely, 2^20425230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20425230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31726080).

20425230 is an abundant number, since it is smaller than the sum of its proper divisors (43026930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20425230 is a wasteful number, since it uses less digits than its factorization.

20425230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20425230 is about 4519.4280611600. The cubic root of 20425230 is about 273.3520395024.

Adding to 20425230 its reverse (3252402), we get a palindrome (23677632).

The spelling of 20425230 in words is "twenty million, four hundred twenty-five thousand, two hundred thirty".