23440240213 has 32 divisors (see below), whose sum is σ = 26453306880. Its totient is φ = 20632112640.

The previous prime is 23440240193. The next prime is 23440240247. The reversal of 23440240213 is 31204204432.

It is a happy number.

It is not a de Polignac number, because 23440240213 - 2⁵ = 23440240181 is a prime.

It is a super-2 number, since 2×23440240213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440240253) 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 31 ways as a sum of consecutive naturals, for example, 3412020 + ... + 3418882.

It is an arithmetic number, because the mean of its divisors is an integer number (826665840).

Almost surely, 2^23440240213 is an apocalyptic number.

It is an amenable number.

23440240213 is a deficient number, since it is larger than the sum of its proper divisors (3013066667).

23440240213 is a wasteful number, since it uses less digits than its factorization.

23440240213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069.

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

Adding to 23440240213 its reverse (31204204432), we get a palindrome (54644444645).

The spelling of 23440240213 in words is "twenty-three billion, four hundred forty million, two hundred forty thousand, two hundred thirteen".