20265664753 has 4 divisors (see below), whose sum is σ = 20813385460. Its totient is φ = 19717944048.

The previous prime is 20265664733. The next prime is 20265664799. The reversal of 20265664753 is 35746656202.

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 6946889104 + 13318775649 = 83348^2 + 115407^2 .

It is a cyclic number.

It is not a de Polignac number, because 20265664753 - 2²⁵ = 20232110321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20265664703) by changing a digit.

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, 273860298 + ... + 273860371.

It is an arithmetic number, because the mean of its divisors is an integer number (5203346365).

Almost surely, 2^20265664753 is an apocalyptic number.

It is an amenable number.

20265664753 is a deficient number, since it is larger than the sum of its proper divisors (547720707).

20265664753 is an equidigital number, since it uses as much as digits as its factorization.

20265664753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547720706.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 20265664753 in words is "twenty billion, two hundred sixty-five million, six hundred sixty-four thousand, seven hundred fifty-three".