23918560349 has 4 divisors (see below), whose sum is σ = 24565007964. Its totient is φ = 23272112736.

The previous prime is 23918560313. The next prime is 23918560357. The reversal of 23918560349 is 94306581932.

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 9618705625 + 14299854724 = 98075^2 + 119582^2 .

It is a cyclic number.

It is not a de Polignac number, because 23918560349 - 2⁸ = 23918560093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23918560297 and 23918560306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23918560249) 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, 323223752 + ... + 323223825.

It is an arithmetic number, because the mean of its divisors is an integer number (6141251991).

Almost surely, 2^23918560349 is an apocalyptic number.

It is an amenable number.

23918560349 is a deficient number, since it is larger than the sum of its proper divisors (646447615).

23918560349 is an equidigital number, since it uses as much as digits as its factorization.

23918560349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646447614.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 23918560349 in words is "twenty-three billion, nine hundred eighteen million, five hundred sixty thousand, three hundred forty-nine".