18520323605711 has 2 divisors, whose sum is σ = 18520323605712. Its totient is φ = 18520323605710.

The previous prime is 18520323605699. The next prime is 18520323605731. The reversal of 18520323605711 is 11750632302581.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18520323605711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18520323605731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9260161802855 + 9260161802856.

It is an arithmetic number, because the mean of its divisors is an integer number (9260161802856).

Almost surely, 2^{18520323605711} is an apocalyptic number.

18520323605711 is a deficient number, since it is larger than the sum of its proper divisors (1).

18520323605711 is an equidigital number, since it uses as much as digits as its factorization.

18520323605711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 18520323605711 in words is "eighteen trillion, five hundred twenty billion, three hundred twenty-three million, six hundred five thousand, seven hundred eleven".