20532305 has 8 divisors (see below), whose sum is σ = 24767592. Its totient is φ = 16339968.

The previous prime is 20532301. The next prime is 20532313. The reversal of 20532305 is 50323502.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 20349121 = 428^2 + 4511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20532305 - 2² = 20532301 is a prime.

It is a super-2 number, since 2×20532305² = 843151097226050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532301) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9674 + ... + 11603.

It is an arithmetic number, because the mean of its divisors is an integer number (3095949).

Almost surely, 2^20532305 is an apocalyptic number.

It is an amenable number.

20532305 is a deficient number, since it is larger than the sum of its proper divisors (4235287).

20532305 is a wasteful number, since it uses less digits than its factorization.

20532305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21475.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 20532305 is about 4531.2586551641. The cubic root of 20532305 is about 273.8288708891.

Adding to 20532305 its reverse (50323502), we get a palindrome (70855807).

The spelling of 20532305 in words is "twenty million, five hundred thirty-two thousand, three hundred five".