20530664244213 has 4 divisors (see below), whose sum is σ = 27374218992288. Its totient is φ = 13687109496140.

The previous prime is 20530664244179. The next prime is 20530664244217. The reversal of 20530664244213 is 31244246603502.

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 20530664244213 - 2⁶ = 20530664244149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530664244217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421777374033 + ... + 3421777374038.

It is an arithmetic number, because the mean of its divisors is an integer number (6843554748072).

Almost surely, 2^{20530664244213} is an apocalyptic number.

It is an amenable number.

20530664244213 is a deficient number, since it is larger than the sum of its proper divisors (6843554748075).

20530664244213 is an equidigital number, since it uses as much as digits as its factorization.

20530664244213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843554748074.

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 20530664244213 in words is "twenty trillion, five hundred thirty billion, six hundred sixty-four million, two hundred forty-four thousand, two hundred thirteen".