20045342305 has 8 divisors (see below), whose sum is σ = 24057352872. Its totient is φ = 16034312448.

The previous prime is 20045342297. The next prime is 20045342321. The reversal of 20045342305 is 50324354002.

It can be written as a sum of positive squares in 4 ways, for example, as 2134070416 + 17911271889 = 46196^2 + 133833^2 .

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 20045342305 - 2³ = 20045342297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199432 + ... + 282601.

It is an arithmetic number, because the mean of its divisors is an integer number (3007169109).

Almost surely, 2^20045342305 is an apocalyptic number.

It is an amenable number.

20045342305 is a deficient number, since it is larger than the sum of its proper divisors (4012010567).

20045342305 is an equidigital number, since it uses as much as digits as its factorization.

20045342305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490355.

The product of its (nonzero) digits is 14400, while the sum is 28.

Adding to 20045342305 its reverse (50324354002), we get a palindrome (70369696307).

The spelling of 20045342305 in words is "twenty billion, forty-five million, three hundred forty-two thousand, three hundred five".