20527261 has 4 divisors (see below), whose sum is σ = 20584800. Its totient is φ = 20469724.

The previous prime is 20527253. The next prime is 20527289. The reversal of 20527261 is 16272502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20527261 - 2³ = 20527253 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 (20527561) 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 3 ways as a sum of consecutive naturals, for example, 28231 + ... + 28948.

It is an arithmetic number, because the mean of its divisors is an integer number (5146200).

Almost surely, 2^20527261 is an apocalyptic number.

It is an amenable number.

20527261 is a deficient number, since it is larger than the sum of its proper divisors (57539).

20527261 is an equidigital number, since it uses as much as digits as its factorization.

20527261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57538.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20527261 is about 4530.7020427302. The cubic root of 20527261 is about 273.8064459682.

Adding to 20527261 its reverse (16272502), we get a palindrome (36799763).

The spelling of 20527261 in words is "twenty million, five hundred twenty-seven thousand, two hundred sixty-one".