20365025 has 6 divisors (see below), whose sum is σ = 25252662. Its totient is φ = 16292000.

The previous prime is 20365019. The next prime is 20365027. The reversal of 20365025 is 52056302.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5650129 + 14714896 = 2377^2 + 3836^2 .

It is not a de Polignac number, because 20365025 - 2⁸ = 20364769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407276 + ... + 407325.

It is an arithmetic number, because the mean of its divisors is an integer number (4208777).

Almost surely, 2^20365025 is an apocalyptic number.

20365025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20365025 is a deficient number, since it is larger than the sum of its proper divisors (4887637).

20365025 is an equidigital number, since it uses as much as digits as its factorization.

20365025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814611 (or 814606 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20365025 is about 4512.7624577414. The cubic root of 20365025 is about 273.0831995160.

The spelling of 20365025 in words is "twenty million, three hundred sixty-five thousand, twenty-five".