23167520909 has 12 divisors (see below), whose sum is σ = 25185153084. Its totient is φ = 21185404224.

The previous prime is 23167520869. The next prime is 23167520921. The reversal of 23167520909 is 90902576132.

It can be written as a sum of positive squares in 2 ways, for example, as 5278458409 + 17889062500 = 72653^2 + 133750^2 .

It is not a de Polignac number, because 23167520909 - 2¹⁶ = 23167455373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23167520909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23167520939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71009 + ... + 226665.

It is an arithmetic number, because the mean of its divisors is an integer number (2098762757).

Almost surely, 2^23167520909 is an apocalyptic number.

It is an amenable number.

23167520909 is a deficient number, since it is larger than the sum of its proper divisors (2017632175).

23167520909 is a wasteful number, since it uses less digits than its factorization.

23167520909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155884 (or 155777 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 23167520909 in words is "twenty-three billion, one hundred sixty-seven million, five hundred twenty thousand, nine hundred nine".