23115972818 has 16 divisors (see below), whose sum is σ = 35293031424. Its totient is φ = 11353431600.

The previous prime is 23115972811. The next prime is 23115972821. The reversal of 23115972818 is 81827951132.

It is a super-2 number, since 2×23115972818² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23115972811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424880 + ... + 476187.

It is an arithmetic number, because the mean of its divisors is an integer number (2205814464).

Almost surely, 2^23115972818 is an apocalyptic number.

23115972818 is a deficient number, since it is larger than the sum of its proper divisors (12177058606).

23115972818 is a wasteful number, since it uses less digits than its factorization.

23115972818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901297.

The product of its digits is 241920, while the sum is 47.

The spelling of 23115972818 in words is "twenty-three billion, one hundred fifteen million, nine hundred seventy-two thousand, eight hundred eighteen".