18520407611 has 2 divisors, whose sum is σ = 18520407612. Its totient is φ = 18520407610.

The previous prime is 18520407601. The next prime is 18520407637. The reversal of 18520407611 is 11670402581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18520407611 - 2¹⁸ = 18520145467 is a prime.

It is not a weakly prime, because it can be changed into another prime (18520407601) 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, 9260203805 + 9260203806.

It is an arithmetic number, because the mean of its divisors is an integer number (9260203806).

Almost surely, 2^18520407611 is an apocalyptic number.

18520407611 is a deficient number, since it is larger than the sum of its proper divisors (1).

18520407611 is an equidigital number, since it uses as much as digits as its factorization.

18520407611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 18520407611 in words is "eighteen billion, five hundred twenty million, four hundred seven thousand, six hundred eleven".