20135305 has 8 divisors (see below), whose sum is σ = 24751944. Its totient is φ = 15715200.

The previous prime is 20135267. The next prime is 20135321. The reversal of 20135305 is 50353102.

It can be written as a sum of positive squares in 4 ways, for example, as 915849 + 19219456 = 957^2 + 4384^2 .

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

It is not a de Polignac number, because 20135305 - 2¹³ = 20127113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 48906 + ... + 49315.

It is an arithmetic number, because the mean of its divisors is an integer number (3093993).

Almost surely, 2^20135305 is an apocalyptic number.

It is an amenable number.

20135305 is a deficient number, since it is larger than the sum of its proper divisors (4616639).

20135305 is an equidigital number, since it uses as much as digits as its factorization.

20135305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98267.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20135305 is about 4487.2380146366. The cubic root of 20135305 is about 272.0525102269.

Adding to 20135305 its reverse (50353102), we get a palindrome (70488407).

The spelling of 20135305 in words is "twenty million, one hundred thirty-five thousand, three hundred five".