20344555153213 has 2 divisors, whose sum is σ = 20344555153214. Its totient is φ = 20344555153212.

The previous prime is 20344555153207. The next prime is 20344555153253. The reversal of 20344555153213 is 31235155544302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14597733207204 + 5746821946009 = 3820698^2 + 2397253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344555153213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20344555153213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344555153253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172277576606 + 10172277576607.

It is an arithmetic number, because the mean of its divisors is an integer number (10172277576607).

Almost surely, 2^{20344555153213} is an apocalyptic number.

It is an amenable number.

20344555153213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344555153213 is an equidigital number, since it uses as much as digits as its factorization.

20344555153213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 20344555153213 in words is "twenty trillion, three hundred forty-four billion, five hundred fifty-five million, one hundred fifty-three thousand, two hundred thirteen".