23942803518721 has 2 divisors, whose sum is σ = 23942803518722. Its totient is φ = 23942803518720.

The previous prime is 23942803518719. The next prime is 23942803518727. The reversal of 23942803518721 is 12781530824932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23859698160321 + 83105358400 = 4884639^2 + 288280^2 .

It is a cyclic number.

It is not a de Polignac number, because 23942803518721 - 2¹ = 23942803518719 is a prime.

Together with 23942803518719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23942803518727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11971401759360 + 11971401759361.

It is an arithmetic number, because the mean of its divisors is an integer number (11971401759361).

Almost surely, 2^{23942803518721} is an apocalyptic number.

It is an amenable number.

23942803518721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23942803518721 is an equidigital number, since it uses as much as digits as its factorization.

23942803518721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 23942803518721 in words is "twenty-three trillion, nine hundred forty-two billion, eight hundred three million, five hundred eighteen thousand, seven hundred twenty-one".