23686631858 has 6 divisors (see below), whose sum is σ = 35530274271. Its totient is φ = 11843207102.

The previous prime is 23686631849. The next prime is 23686631867. The reversal of 23686631858 is 85813668632.

It is an interprime number because it is at equal distance from previous prime (23686631849) and next prime (23686631867).

It can be written as a sum of positive squares in only one way, i.e., 11843315929 + 11843315929 = 108827^2 + 108827^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=108827.

It is a super-2 number, since 2×23686631858² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 163241 + ... + 272067.

Almost surely, 2^23686631858 is an apocalyptic number.

23686631858 is a deficient number, since it is larger than the sum of its proper divisors (11843642413).

23686631858 is an frugal number, since it uses more digits than its factorization.

23686631858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217656 (or 108829 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The spelling of 23686631858 in words is "twenty-three billion, six hundred eighty-six million, six hundred thirty-one thousand, eight hundred fifty-eight".