18485826344813 has 2 divisors, whose sum is σ = 18485826344814. Its totient is φ = 18485826344812.

The previous prime is 18485826344803. The next prime is 18485826344819. The reversal of 18485826344813 is 31844362858481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16290563328649 + 2195263016164 = 4036157^2 + 1481642^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485826344813 - 2¹⁴ = 18485826328429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18485826344813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18485826344819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242913172406 + 9242913172407.

It is an arithmetic number, because the mean of its divisors is an integer number (9242913172407).

Almost surely, 2^{18485826344813} is an apocalyptic number.

It is an amenable number.

18485826344813 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485826344813 is an equidigital number, since it uses as much as digits as its factorization.

18485826344813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141557760, while the sum is 65.

The spelling of 18485826344813 in words is "eighteen trillion, four hundred eighty-five billion, eight hundred twenty-six million, three hundred forty-four thousand, eight hundred thirteen".