20320620244213 has 4 divisors (see below), whose sum is σ = 20334434399488. Its totient is φ = 20306806088940.

The previous prime is 20320620244201. The next prime is 20320620244219. The reversal of 20320620244213 is 31244202602302.

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 20320620244213 - 2³³ = 20312030309621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320620244219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6907075431 + ... + 6907078372.

It is an arithmetic number, because the mean of its divisors is an integer number (5083608599872).

Almost surely, 2^{20320620244213} is an apocalyptic number.

It is an amenable number.

20320620244213 is a deficient number, since it is larger than the sum of its proper divisors (13814155275).

20320620244213 is a wasteful number, since it uses less digits than its factorization.

20320620244213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814155274.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 20320620244213 its reverse (31244202602302), we get a palindrome (51564822846515).

The spelling of 20320620244213 in words is "twenty trillion, three hundred twenty billion, six hundred twenty million, two hundred forty-four thousand, two hundred thirteen".