23121686593 has 4 divisors (see below), whose sum is σ = 23122169280. Its totient is φ = 23121203908.

The previous prime is 23121686543. The next prime is 23121686597. The reversal of 23121686593 is 39568612132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23121686593 - 2¹⁷ = 23121555521 is a prime.

It is a super-2 number, since 2×23121686593² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121686597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160453 + ... + 268306.

It is an arithmetic number, because the mean of its divisors is an integer number (5780542320).

Almost surely, 2^23121686593 is an apocalyptic number.

It is an amenable number.

23121686593 is a deficient number, since it is larger than the sum of its proper divisors (482687).

23121686593 is an equidigital number, since it uses as much as digits as its factorization.

23121686593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482686.

The product of its digits is 466560, while the sum is 46.

The spelling of 23121686593 in words is "twenty-three billion, one hundred twenty-one million, six hundred eighty-six thousand, five hundred ninety-three".