18541525893811 has 2 divisors, whose sum is σ = 18541525893812. Its totient is φ = 18541525893810.

The previous prime is 18541525893797. The next prime is 18541525893871. The reversal of 18541525893811 is 11839852514581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18541525893811 - 2⁹ = 18541525893299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18541525893811.

It is not a weakly prime, because it can be changed into another prime (18541525893871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9270762946905 + 9270762946906.

It is an arithmetic number, because the mean of its divisors is an integer number (9270762946906).

Almost surely, 2^{18541525893811} is an apocalyptic number.

18541525893811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18541525893811 is an equidigital number, since it uses as much as digits as its factorization.

18541525893811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824000, while the sum is 61.

The spelling of 18541525893811 in words is "eighteen trillion, five hundred forty-one billion, five hundred twenty-five million, eight hundred ninety-three thousand, eight hundred eleven".