20045125 has 16 divisors (see below), whose sum is σ = 26490672. Its totient is φ = 15091200.

The previous prime is 20045117. The next prime is 20045131. The reversal of 20045125 is 52154002.

It can be written as a sum of positive squares in 8 ways, for example, as 2455489 + 17589636 = 1567^2 + 4194^2 .

It is not a de Polignac number, because 20045125 - 2³ = 20045117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2592 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (1655667).

Almost surely, 2^20045125 is an apocalyptic number.

20045125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20045125 is a deficient number, since it is larger than the sum of its proper divisors (6445547).

20045125 is an equidigital number, since it uses as much as digits as its factorization.

20045125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9465 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20045125 is about 4477.1782408120. The cubic root of 20045125 is about 271.6457551411.

Adding to 20045125 its reverse (52154002), we get a palindrome (72199127).

The spelling of 20045125 in words is "twenty million, forty-five thousand, one hundred twenty-five".