20466663742205 has 4 divisors (see below), whose sum is σ = 24559996490652. Its totient is φ = 16373330993760.

The previous prime is 20466663742193. The next prime is 20466663742253. The reversal of 20466663742205 is 50224736666402.

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 5387871950041 + 15078791792164 = 2321179^2 + 3883142^2 .

It is not a de Polignac number, because 20466663742205 - 2¹² = 20466663738109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046666374216 + ... + 2046666374225.

It is an arithmetic number, because the mean of its divisors is an integer number (6139999122663).

Almost surely, 2^{20466663742205} is an apocalyptic number.

It is an amenable number.

20466663742205 is a deficient number, since it is larger than the sum of its proper divisors (4093332748447).

20466663742205 is an equidigital number, since it uses as much as digits as its factorization.

20466663742205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093332748446.

The product of its (nonzero) digits is 17418240, while the sum is 53.

The spelling of 20466663742205 in words is "twenty trillion, four hundred sixty-six billion, six hundred sixty-three million, seven hundred forty-two thousand, two hundred five".