23840865518 has 16 divisors (see below), whose sum is σ = 39086354304. Its totient is φ = 10857319680.

The previous prime is 23840865511. The next prime is 23840865539. The reversal of 23840865518 is 81556804832.

It is a super-2 number, since 2×23840865518² (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 (23840865511) 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 7 ways as a sum of consecutive naturals, for example, 11308655 + ... + 11310762.

It is an arithmetic number, because the mean of its divisors is an integer number (2442897144).

Almost surely, 2^23840865518 is an apocalyptic number.

23840865518 is a deficient number, since it is larger than the sum of its proper divisors (15245488786).

23840865518 is a wasteful number, since it uses less digits than its factorization.

23840865518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22619467.

The product of its (nonzero) digits is 1843200, while the sum is 50.

The spelling of 23840865518 in words is "twenty-three billion, eight hundred forty million, eight hundred sixty-five thousand, five hundred eighteen".