20025630 has 112 divisors (see below), whose sum is σ = 56188944. Its totient is φ = 5132160.

The previous prime is 20025613. The next prime is 20025637. The reversal of 20025630 is 3652002.

20025630 = 2236² + 2237² + ... + 2239².

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 (20025637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 298857 + ... + 298923.

It is an arithmetic number, because the mean of its divisors is an integer number (501687).

Almost surely, 2^20025630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20025630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28094472).

20025630 is an abundant number, since it is smaller than the sum of its proper divisors (36163314).

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

20025630 is an equidigital number, since it uses as much as digits as its factorization.

20025630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20025630 is about 4475.0005586592. Note that the first 3 decimals coincide. The cubic root of 20025630 is about 271.5576630369.

Adding to 20025630 its reverse (3652002), we get a palindrome (23677632).

The spelling of 20025630 in words is "twenty million, twenty-five thousand, six hundred thirty".