20453357273 has 4 divisors (see below), whose sum is σ = 20461127988. Its totient is φ = 20445586560.

The previous prime is 20453357219. The next prime is 20453357297. The reversal of 20453357273 is 37275335402.

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 8417512009 + 12035845264 = 91747^2 + 109708^2 .

It is a cyclic number.

It is not a de Polignac number, because 20453357273 - 2²² = 20449162969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20453357273.

It is not an unprimeable number, because it can be changed into a prime (20453357173) 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, 3881408 + ... + 3886673.

It is an arithmetic number, because the mean of its divisors is an integer number (5115281997).

Almost surely, 2^20453357273 is an apocalyptic number.

It is an amenable number.

20453357273 is a deficient number, since it is larger than the sum of its proper divisors (7770715).

20453357273 is an equidigital number, since it uses as much as digits as its factorization.

20453357273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770714.

The product of its (nonzero) digits is 529200, while the sum is 41.

The spelling of 20453357273 in words is "twenty billion, four hundred fifty-three million, three hundred fifty-seven thousand, two hundred seventy-three".