20065652105 has 4 divisors (see below), whose sum is σ = 24078782532. Its totient is φ = 16052521680.

The previous prime is 20065652093. The next prime is 20065652161. The reversal of 20065652105 is 50125656002.

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 13561068304 + 6504583801 = 116452^2 + 80651^2 .

It is not a de Polignac number, because 20065652105 - 2⁸ = 20065651849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006565206 + ... + 2006565215.

It is an arithmetic number, because the mean of its divisors is an integer number (6019695633).

Almost surely, 2^20065652105 is an apocalyptic number.

It is an amenable number.

20065652105 is a deficient number, since it is larger than the sum of its proper divisors (4013130427).

20065652105 is an equidigital number, since it uses as much as digits as its factorization.

20065652105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013130426.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 20065652105 in words is "twenty billion, sixty-five million, six hundred fifty-two thousand, one hundred five".