23440374013 has 4 divisors (see below), whose sum is σ = 26788998880. Its totient is φ = 20091749148.

The previous prime is 23440373989. The next prime is 23440374019. The reversal of 23440374013 is 31047304432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23440374013 - 2¹³ = 23440365821 is a prime.

It is a super-2 number, since 2×23440374013² (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 (23440374019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674312423 + ... + 1674312436.

It is an arithmetic number, because the mean of its divisors is an integer number (6697249720).

Almost surely, 2^23440374013 is an apocalyptic number.

It is an amenable number.

23440374013 is a deficient number, since it is larger than the sum of its proper divisors (3348624867).

23440374013 is an equidigital number, since it uses as much as digits as its factorization.

23440374013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348624866.

The product of its (nonzero) digits is 24192, while the sum is 31.

Adding to 23440374013 its reverse (31047304432), we get a palindrome (54487678445).

The spelling of 23440374013 in words is "twenty-three billion, four hundred forty million, three hundred seventy-four thousand, thirteen".