20243525 has 6 divisors (see below), whose sum is σ = 25102002. Its totient is φ = 16194800.

The previous prime is 20243507. The next prime is 20243533. The reversal of 20243525 is 52534202.

It can be written as a sum of positive squares in 3 ways, for example, as 1181569 + 19061956 = 1087^2 + 4366^2 .

It is not a de Polignac number, because 20243525 - 2⁸ = 20243269 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 20243525.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 404846 + ... + 404895.

It is an arithmetic number, because the mean of its divisors is an integer number (4183667).

Almost surely, 2^20243525 is an apocalyptic number.

20243525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20243525 is a deficient number, since it is larger than the sum of its proper divisors (4858477).

20243525 is an equidigital number, since it uses as much as digits as its factorization.

20243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809751 (or 809746 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20243525 is about 4499.2804980352. The cubic root of 20243525 is about 272.5390343319.

Adding to 20243525 its reverse (52534202), we get a palindrome (72777727).

The spelling of 20243525 in words is "twenty million, two hundred forty-three thousand, five hundred twenty-five".