20660453105 has 8 divisors (see below), whose sum is σ = 24830514792. Its totient is φ = 16503048448.

The previous prime is 20660453101. The next prime is 20660453153. The reversal of 20660453105 is 50135406602.

It can be written as a sum of positive squares in 4 ways, for example, as 623201296 + 20037251809 = 24964^2 + 141553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20660453105 - 2² = 20660453101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20660453101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3160664 + ... + 3167193.

It is an arithmetic number, because the mean of its divisors is an integer number (3103814349).

Almost surely, 2^20660453105 is an apocalyptic number.

It is an amenable number.

20660453105 is a deficient number, since it is larger than the sum of its proper divisors (4170061687).

20660453105 is an equidigital number, since it uses as much as digits as its factorization.

20660453105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328515.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 20660453105 its reverse (50135406602), we get a palindrome (70795859707).

The spelling of 20660453105 in words is "twenty billion, six hundred sixty million, four hundred fifty-three thousand, one hundred five".