20611665741 has 4 divisors (see below), whose sum is σ = 27482220992. Its totient is φ = 13741110492.

The previous prime is 20611665727. The next prime is 20611665743. The reversal of 20611665741 is 14756611602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20611665741 - 2⁹ = 20611665229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20611665741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611665743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3435277621 + ... + 3435277626.

It is an arithmetic number, because the mean of its divisors is an integer number (6870555248).

Almost surely, 2^20611665741 is an apocalyptic number.

It is an amenable number.

20611665741 is a deficient number, since it is larger than the sum of its proper divisors (6870555251).

20611665741 is an equidigital number, since it uses as much as digits as its factorization.

20611665741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870555250.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20611665741 in words is "twenty billion, six hundred eleven million, six hundred sixty-five thousand, seven hundred forty-one".