20288025 has 36 divisors (see below), whose sum is σ = 37335532. Its totient is φ = 10523520.

The previous prime is 20288017. The next prime is 20288027. The reversal of 20288025 is 52088202.

It can be written as a sum of positive squares in 6 ways, for example, as 2471184 + 17816841 = 1572^2 + 4221^2 .

It is not a de Polignac number, because 20288025 - 2³ = 20288017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20288025.

It is not an unprimeable number, because it can be changed into a prime (20288027) 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, 7107 + ... + 9543.

Almost surely, 2^20288025 is an apocalyptic number.

20288025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20288025 is a deficient number, since it is larger than the sum of its proper divisors (17047507).

20288025 is a wasteful number, since it uses less digits than its factorization.

20288025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 2482 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20288025 is about 4504.2230184572. The cubic root of 20288025 is about 272.7385896819.

The spelling of 20288025 in words is "twenty million, two hundred eighty-eight thousand, twenty-five".