20025000 has 144 divisors (see below), whose sum is σ = 68550300. Its totient is φ = 5280000.

The previous prime is 20024989. The next prime is 20025001. The reversal of 20025000 is 52002.

It can be written as a sum of positive squares in 6 ways, for example, as 4955076 + 15069924 = 2226^2 + 3882^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025001) 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 35 ways as a sum of consecutive naturals, for example, 224956 + ... + 225044.

Almost surely, 2^20025000 is an apocalyptic number.

20025000 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 20025000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34275150).

20025000 is an abundant number, since it is smaller than the sum of its proper divisors (48525300).

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

20025000 is an equidigital number, since it uses as much as digits as its factorization.

20025000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 20025000 is about 4474.9301670529. The cubic root of 20025000 is about 271.5548153009.

Adding to 20025000 its reverse (52002), we get a palindrome (20077002).

It can be divided in two parts, 200 and 25000, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 20025000 in words is "twenty million, twenty-five thousand".