18615820717343 has 2 divisors, whose sum is σ = 18615820717344. Its totient is φ = 18615820717342.

The previous prime is 18615820717337. The next prime is 18615820717453. The reversal of 18615820717343 is 34371702851681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18615820717343 - 2³² = 18611525750047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18615820737343) 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, 9307910358671 + 9307910358672.

It is an arithmetic number, because the mean of its divisors is an integer number (9307910358672).

Almost surely, 2^{18615820717343} is an apocalyptic number.

18615820717343 is a deficient number, since it is larger than the sum of its proper divisors (1).

18615820717343 is an equidigital number, since it uses as much as digits as its factorization.

18615820717343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 18615820717343 in words is "eighteen trillion, six hundred fifteen billion, eight hundred twenty million, seven hundred seventeen thousand, three hundred forty-three".