20535125 has 16 divisors (see below), whose sum is σ = 27601392. Its totient is φ = 15163200.

The previous prime is 20535121. The next prime is 20535131. The reversal of 20535125 is 52153502.

It can be written as a sum of positive squares in 8 ways, for example, as 15194404 + 5340721 = 3898^2 + 2311^2 .

It is not a de Polignac number, because 20535125 - 2² = 20535121 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4694 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (1725087).

Almost surely, 2^20535125 is an apocalyptic number.

20535125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20535125 is a deficient number, since it is larger than the sum of its proper divisors (7066267).

20535125 is a wasteful number, since it uses less digits than its factorization.

20535125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665 (or 12655 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 20535125 is about 4531.5698162999. The cubic root of 20535125 is about 273.8414066153.

Adding to 20535125 its reverse (52153502), we get a palindrome (72688627).

The spelling of 20535125 in words is "twenty million, five hundred thirty-five thousand, one hundred twenty-five".