18518351707 has 2 divisors, whose sum is σ = 18518351708. Its totient is φ = 18518351706.

The previous prime is 18518351699. The next prime is 18518351743. The reversal of 18518351707 is 70715381581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18518351707 - 2³ = 18518351699 is a prime.

It is not a weakly prime, because it can be changed into another prime (18518351777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9259175853 + 9259175854.

It is an arithmetic number, because the mean of its divisors is an integer number (9259175854).

Almost surely, 2^18518351707 is an apocalyptic number.

18518351707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18518351707 is an equidigital number, since it uses as much as digits as its factorization.

18518351707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 46.

The spelling of 18518351707 in words is "eighteen billion, five hundred eighteen million, three hundred fifty-one thousand, seven hundred seven".