23520712321 has 4 divisors (see below), whose sum is σ = 24904283652. Its totient is φ = 22137140992.

The previous prime is 23520712301. The next prime is 23520712337. The reversal of 23520712321 is 12321702532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9426273921 + 14094438400 = 97089^2 + 118720^2 .

It is a cyclic number.

It is not a de Polignac number, because 23520712321 - 2¹¹ = 23520710273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23520712321.

It is not an unprimeable number, because it can be changed into a prime (23520712301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691785640 + ... + 691785673.

It is an arithmetic number, because the mean of its divisors is an integer number (6226070913).

Almost surely, 2^23520712321 is an apocalyptic number.

It is an amenable number.

23520712321 is a deficient number, since it is larger than the sum of its proper divisors (1383571331).

23520712321 is a wasteful number, since it uses less digits than its factorization.

23520712321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383571330.

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 23520712321 in words is "twenty-three billion, five hundred twenty million, seven hundred twelve thousand, three hundred twenty-one".