23187904313 has 6 divisors (see below), whose sum is σ = 26973684666. Its totient is φ = 19875346512.

The previous prime is 23187904301. The next prime is 23187904321. The reversal of 23187904313 is 31340978132.

It can be written as a sum of positive squares in only one way, i.e., 16059985984 + 7127918329 = 126728^2 + 84427^2 .

It is not a de Polignac number, because 23187904313 - 2⁴ = 23187904297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23187904213) 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 5 ways as a sum of consecutive naturals, for example, 236611220 + ... + 236611317.

It is an arithmetic number, because the mean of its divisors is an integer number (4495614111).

Almost surely, 2^23187904313 is an apocalyptic number.

It is an amenable number.

23187904313 is a deficient number, since it is larger than the sum of its proper divisors (3785780353).

23187904313 is an equidigital number, since it uses as much as digits as its factorization.

23187904313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473222551 (or 473222544 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 23187904313 in words is "twenty-three billion, one hundred eighty-seven million, nine hundred four thousand, three hundred thirteen".