23251921709 has 2 divisors, whose sum is σ = 23251921710. Its totient is φ = 23251921708.

The previous prime is 23251921703. The next prime is 23251921711. The reversal of 23251921709 is 90712915232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20787295684 + 2464626025 = 144178^2 + 49645^2 .

It is a cyclic number.

It is not a de Polignac number, because 23251921709 - 2¹² = 23251917613 is a prime.

It is a super-2 number, since 2×23251921709² (a number of 22 digits) contains 22 as substring.

Together with 23251921711, 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 (23251921703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11625960854 + 11625960855.

It is an arithmetic number, because the mean of its divisors is an integer number (11625960855).

Almost surely, 2^23251921709 is an apocalyptic number.

It is an amenable number.

23251921709 is a deficient number, since it is larger than the sum of its proper divisors (1).

23251921709 is an equidigital number, since it uses as much as digits as its factorization.

23251921709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 23251921709 in words is "twenty-three billion, two hundred fifty-one million, nine hundred twenty-one thousand, seven hundred nine".