18017436851 has 2 divisors, whose sum is σ = 18017436852. Its totient is φ = 18017436850.

The previous prime is 18017436823. The next prime is 18017436919. The reversal of 18017436851 is 15863471081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18017436851 - 2¹⁰ = 18017435827 is a prime.

It is not a weakly prime, because it can be changed into another prime (18017438851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9008718425 + 9008718426.

It is an arithmetic number, because the mean of its divisors is an integer number (9008718426).

Almost surely, 2^18017436851 is an apocalyptic number.

18017436851 is a deficient number, since it is larger than the sum of its proper divisors (1).

18017436851 is an equidigital number, since it uses as much as digits as its factorization.

18017436851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 18017436851 in words is "eighteen billion, seventeen million, four hundred thirty-six thousand, eight hundred fifty-one".