20356441205 has 4 divisors (see below), whose sum is σ = 24427729452. Its totient is φ = 16285152960.

The previous prime is 20356441199. The next prime is 20356441267. The reversal of 20356441205 is 50214465302.

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 16047569041 + 4308872164 = 126679^2 + 65642^2 .

It is not a de Polignac number, because 20356441205 - 2¹⁴ = 20356424821 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035644116 + ... + 2035644125.

It is an arithmetic number, because the mean of its divisors is an integer number (6106932363).

Almost surely, 2^20356441205 is an apocalyptic number.

It is an amenable number.

20356441205 is a deficient number, since it is larger than the sum of its proper divisors (4071288247).

20356441205 is an equidigital number, since it uses as much as digits as its factorization.

20356441205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071288246.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20356441205 in words is "twenty billion, three hundred fifty-six million, four hundred forty-one thousand, two hundred five".