18851543411 has 2 divisors, whose sum is σ = 18851543412. Its totient is φ = 18851543410.

The previous prime is 18851543369. The next prime is 18851543419. The reversal of 18851543411 is 11434515881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18851543411 - 2²⁶ = 18784434547 is a prime.

It is not a weakly prime, because it can be changed into another prime (18851543419) 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, 9425771705 + 9425771706.

It is an arithmetic number, because the mean of its divisors is an integer number (9425771706).

Almost surely, 2^18851543411 is an apocalyptic number.

18851543411 is a deficient number, since it is larger than the sum of its proper divisors (1).

18851543411 is an equidigital number, since it uses as much as digits as its factorization.

18851543411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 41.

The spelling of 18851543411 in words is "eighteen billion, eight hundred fifty-one million, five hundred forty-three thousand, four hundred eleven".