20453306353 has 4 divisors (see below), whose sum is σ = 20453725168. Its totient is φ = 20452887540.

The previous prime is 20453306351. The next prime is 20453306381. The reversal of 20453306353 is 35360335402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20453306353 - 2¹ = 20453306351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20453306351) 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, 124743 + ... + 237628.

It is an arithmetic number, because the mean of its divisors is an integer number (5113431292).

Almost surely, 2^20453306353 is an apocalyptic number.

It is an amenable number.

20453306353 is a deficient number, since it is larger than the sum of its proper divisors (418815).

20453306353 is an equidigital number, since it uses as much as digits as its factorization.

20453306353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418814.

The product of its (nonzero) digits is 97200, while the sum is 34.

The spelling of 20453306353 in words is "twenty billion, four hundred fifty-three million, three hundred six thousand, three hundred fifty-three".