20344135461205 has 4 divisors (see below), whose sum is σ = 24412962553452. Its totient is φ = 16275308368960.

The previous prime is 20344135461197. The next prime is 20344135461259. The reversal of 20344135461205 is 50216453144302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7813908943569 + 12530226517636 = 2795337^2 + 3539806^2 .

It is not a de Polignac number, because 20344135461205 - 2³ = 20344135461197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2034413546116 + ... + 2034413546125.

It is an arithmetic number, because the mean of its divisors is an integer number (6103240638363).

Almost surely, 2^{20344135461205} is an apocalyptic number.

It is an amenable number.

20344135461205 is a deficient number, since it is larger than the sum of its proper divisors (4068827092247).

20344135461205 is an equidigital number, since it uses as much as digits as its factorization.

20344135461205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068827092246.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20344135461205 in words is "twenty trillion, three hundred forty-four billion, one hundred thirty-five million, four hundred sixty-one thousand, two hundred five".