20344133550613 has 2 divisors, whose sum is σ = 20344133550614. Its totient is φ = 20344133550612.

The previous prime is 20344133550547. The next prime is 20344133550659. The reversal of 20344133550613 is 31605533144302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15102565984804 + 5241567565809 = 3886202^2 + 2289447^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344133550613 - 2³³ = 20335543616021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344133557613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172066775306 + 10172066775307.

It is an arithmetic number, because the mean of its divisors is an integer number (10172066775307).

Almost surely, 2^{20344133550613} is an apocalyptic number.

It is an amenable number.

20344133550613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344133550613 is an equidigital number, since it uses as much as digits as its factorization.

20344133550613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

Adding to 20344133550613 its reverse (31605533144302), we get a palindrome (51949666694915).

The spelling of 20344133550613 in words is "twenty trillion, three hundred forty-four billion, one hundred thirty-three million, five hundred fifty thousand, six hundred thirteen".