20323657273 has 4 divisors (see below), whose sum is σ = 20332744740. Its totient is φ = 20314569808.

The previous prime is 20323657271. The next prime is 20323657337. The reversal of 20323657273 is 37275632302.

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 10218783744 + 10104873529 = 101088^2 + 100523^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323657273 - 2¹ = 20323657271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323657271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4540378 + ... + 4544851.

It is an arithmetic number, because the mean of its divisors is an integer number (5083186185).

Almost surely, 2^20323657273 is an apocalyptic number.

It is an amenable number.

20323657273 is a deficient number, since it is larger than the sum of its proper divisors (9087467).

20323657273 is an equidigital number, since it uses as much as digits as its factorization.

20323657273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087466.

The product of its (nonzero) digits is 317520, while the sum is 40.

The spelling of 20323657273 in words is "twenty billion, three hundred twenty-three million, six hundred fifty-seven thousand, two hundred seventy-three".