23440203305 has 4 divisors (see below), whose sum is σ = 28128243972. Its totient is φ = 18752162640.

The previous prime is 23440203299. The next prime is 23440203337. The reversal of 23440203305 is 50330204432.

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 6515234089 + 16924969216 = 80717^2 + 130096^2 .

It is not a de Polignac number, because 23440203305 - 2⁴ = 23440203289 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 3 ways as a sum of consecutive naturals, for example, 2344020326 + ... + 2344020335.

It is an arithmetic number, because the mean of its divisors is an integer number (7032060993).

Almost surely, 2^23440203305 is an apocalyptic number.

It is an amenable number.

23440203305 is a deficient number, since it is larger than the sum of its proper divisors (4688040667).

23440203305 is an equidigital number, since it uses as much as digits as its factorization.

23440203305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688040666.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 23440203305 its reverse (50330204432), we get a palindrome (73770407737).

The spelling of 23440203305 in words is "twenty-three billion, four hundred forty million, two hundred three thousand, three hundred five".