23518921719851 has 2 divisors, whose sum is σ = 23518921719852. Its totient is φ = 23518921719850.

The previous prime is 23518921719817. The next prime is 23518921719871. The reversal of 23518921719851 is 15891712981532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23518921719851 - 2¹⁰ = 23518921718827 is a prime.

It is not a weakly prime, because it can be changed into another prime (23518921719871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11759460859925 + 11759460859926.

It is an arithmetic number, because the mean of its divisors is an integer number (11759460859926).

Almost surely, 2^{23518921719851} is an apocalyptic number.

23518921719851 is a deficient number, since it is larger than the sum of its proper divisors (1).

23518921719851 is an equidigital number, since it uses as much as digits as its factorization.

23518921719851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 62.

The spelling of 23518921719851 in words is "twenty-three trillion, five hundred eighteen billion, nine hundred twenty-one million, seven hundred nineteen thousand, eight hundred fifty-one".