23281350509 has 2 divisors, whose sum is σ = 23281350510. Its totient is φ = 23281350508.

The previous prime is 23281350437. The next prime is 23281350511. The reversal of 23281350509 is 90505318232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18934585609 + 4346764900 = 137603^2 + 65930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23281350509 is a prime.

Together with 23281350511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23281350109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11640675254 + 11640675255.

It is an arithmetic number, because the mean of its divisors is an integer number (11640675255).

Almost surely, 2^23281350509 is an apocalyptic number.

It is an amenable number.

23281350509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23281350509 is an equidigital number, since it uses as much as digits as its factorization.

23281350509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 23281350509 in words is "twenty-three billion, two hundred eighty-one million, three hundred fifty thousand, five hundred nine".