23440430213 has 6 divisors (see below), whose sum is σ = 24276593874. Its totient is φ = 22632138704.

The previous prime is 23440430203. The next prime is 23440430227. The reversal of 23440430213 is 31203404432.

It can be written as a sum of positive squares in 3 ways, for example, as 9011135329 + 14429294884 = 94927^2 + 120122^2 .

It is not a de Polignac number, because 23440430213 - 2⁶ = 23440430149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440430203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13935206 + ... + 13936887.

It is an arithmetic number, because the mean of its divisors is an integer number (4046098979).

Almost surely, 2^23440430213 is an apocalyptic number.

It is an amenable number.

23440430213 is a deficient number, since it is larger than the sum of its proper divisors (836163661).

23440430213 is an equidigital number, since it uses as much as digits as its factorization.

23440430213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27872151 (or 27872122 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 23440430213 its reverse (31203404432), we get a palindrome (54643834645).

The spelling of 23440430213 in words is "twenty-three billion, four hundred forty million, four hundred thirty thousand, two hundred thirteen".