18685018335007 has 2 divisors, whose sum is σ = 18685018335008. Its totient is φ = 18685018335006.

The previous prime is 18685018334839. The next prime is 18685018335019. The reversal of 18685018335007 is 70053381058681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18685018335007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18685018335037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9342509167503 + 9342509167504.

It is an arithmetic number, because the mean of its divisors is an integer number (9342509167504).

Almost surely, 2^{18685018335007} is an apocalyptic number.

18685018335007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18685018335007 is an equidigital number, since it uses as much as digits as its factorization.

18685018335007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 18685018335007 in words is "eighteen trillion, six hundred eighty-five billion, eighteen million, three hundred thirty-five thousand, seven".