20135013 has 4 divisors (see below), whose sum is σ = 26846688. Its totient is φ = 13423340.

The previous prime is 20135009. The next prime is 20135039. The reversal of 20135013 is 31053102.

It is a happy number.

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 20135013 - 2² = 20135009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20134983 and 20135001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135113) 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, 3355833 + ... + 3355838.

It is an arithmetic number, because the mean of its divisors is an integer number (6711672).

Almost surely, 2^20135013 is an apocalyptic number.

It is an amenable number.

20135013 is a deficient number, since it is larger than the sum of its proper divisors (6711675).

20135013 is an equidigital number, since it uses as much as digits as its factorization.

20135013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6711674.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20135013 is about 4487.2054778002. The cubic root of 20135013 is about 272.0511951286.

Adding to 20135013 its reverse (31053102), we get a palindrome (51188115).

The spelling of 20135013 in words is "twenty million, one hundred thirty-five thousand, thirteen".