23531406413 has 4 divisors (see below), whose sum is σ = 23532072348. Its totient is φ = 23530740480.

The previous prime is 23531406359. The next prime is 23531406419. The reversal of 23531406413 is 31460413532.

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 12209808004 + 11321598409 = 110498^2 + 106403^2 .

It is a cyclic number.

It is not a de Polignac number, because 23531406413 - 2³⁰ = 22457664589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23531406413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23531406419) by changing a digit.

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, 276806 + ... + 351687.

It is an arithmetic number, because the mean of its divisors is an integer number (5883018087).

Almost surely, 2^23531406413 is an apocalyptic number.

It is an amenable number.

23531406413 is a deficient number, since it is larger than the sum of its proper divisors (665935).

23531406413 is an equidigital number, since it uses as much as digits as its factorization.

23531406413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665934.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 23531406413 its reverse (31460413532), we get a palindrome (54991819945).

The spelling of 23531406413 in words is "twenty-three billion, five hundred thirty-one million, four hundred six thousand, four hundred thirteen".