18411770813 has 2 divisors, whose sum is σ = 18411770814. Its totient is φ = 18411770812.

The previous prime is 18411770809. The next prime is 18411770869. The reversal of 18411770813 is 31807711481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14734803769 + 3676967044 = 121387^2 + 60638^2 .

It is a cyclic number.

It is not a de Polignac number, because 18411770813 - 2² = 18411770809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18411770893) 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, 9205885406 + 9205885407.

It is an arithmetic number, because the mean of its divisors is an integer number (9205885407).

Almost surely, 2^18411770813 is an apocalyptic number.

It is an amenable number.

18411770813 is a deficient number, since it is larger than the sum of its proper divisors (1).

18411770813 is an equidigital number, since it uses as much as digits as its factorization.

18411770813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 41.

The spelling of 18411770813 in words is "eighteen billion, four hundred eleven million, seven hundred seventy thousand, eight hundred thirteen".