20530413 has 12 divisors (see below), whose sum is σ = 29853408. Its totient is φ = 13595400.

The previous prime is 20530397. The next prime is 20530417. The reversal of 20530413 is 31403502.

It is not a de Polignac number, because 20530413 - 2⁴ = 20530397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530417) 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 11 ways as a sum of consecutive naturals, for example, 6195 + ... + 8912.

It is an arithmetic number, because the mean of its divisors is an integer number (2487784).

Almost surely, 2^20530413 is an apocalyptic number.

It is an amenable number.

20530413 is a deficient number, since it is larger than the sum of its proper divisors (9322995).

20530413 is a wasteful number, since it uses less digits than its factorization.

20530413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15264 (or 15261 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20530413 is about 4531.0498783395. The cubic root of 20530413 is about 273.8204597513.

Adding to 20530413 its reverse (31403502), we get a palindrome (51933915).

The spelling of 20530413 in words is "twenty million, five hundred thirty thousand, four hundred thirteen".