20655020015213 has 2 divisors, whose sum is σ = 20655020015214. Its totient is φ = 20655020015212.

The previous prime is 20655020015143. The next prime is 20655020015233. The reversal of 20655020015213 is 31251002055602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16050103162564 + 4604916852649 = 4006258^2 + 2145907^2 .

It is a cyclic number.

It is not a de Polignac number, because 20655020015213 - 2²⁶ = 20654952906349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20655020015213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20655020015233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327510007606 + 10327510007607.

It is an arithmetic number, because the mean of its divisors is an integer number (10327510007607).

Almost surely, 2^{20655020015213} is an apocalyptic number.

It is an amenable number.

20655020015213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20655020015213 is an equidigital number, since it uses as much as digits as its factorization.

20655020015213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 20655020015213 in words is "twenty trillion, six hundred fifty-five billion, twenty million, fifteen thousand, two hundred thirteen".