23440220413 has 4 divisors (see below), whose sum is σ = 24011933148. Its totient is φ = 22868507680.

The previous prime is 23440220339. The next prime is 23440220423. The reversal of 23440220413 is 31402204432.

It is a happy number.

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 614147524 + 22826072889 = 24782^2 + 151083^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23440220413 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 (23440220423) 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, 285856306 + ... + 285856387.

It is an arithmetic number, because the mean of its divisors is an integer number (6002983287).

Almost surely, 2^23440220413 is an apocalyptic number.

It is an amenable number.

23440220413 is a deficient number, since it is larger than the sum of its proper divisors (571712735).

23440220413 is an equidigital number, since it uses as much as digits as its factorization.

23440220413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571712734.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 23440220413 its reverse (31402204432), we get a palindrome (54842424845).

The spelling of 23440220413 in words is "twenty-three billion, four hundred forty million, two hundred twenty thousand, four hundred thirteen".