20465525 has 6 divisors (see below), whose sum is σ = 25377282. Its totient is φ = 16372400.

The previous prime is 20465521. The next prime is 20465531. The reversal of 20465525 is 52556402.

It can be written as a sum of positive squares in 3 ways, for example, as 743044 + 19722481 = 862^2 + 4441^2 .

It is not a de Polignac number, because 20465525 - 2² = 20465521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465521) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 409286 + ... + 409335.

It is an arithmetic number, because the mean of its divisors is an integer number (4229547).

Almost surely, 2^20465525 is an apocalyptic number.

20465525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20465525 is a deficient number, since it is larger than the sum of its proper divisors (4911757).

20465525 is an equidigital number, since it uses as much as digits as its factorization.

20465525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818631 (or 818626 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20465525 is about 4523.8838402417. The cubic root of 20465525 is about 273.5316781986.

The spelling of 20465525 in words is "twenty million, four hundred sixty-five thousand, five hundred twenty-five".