18069565418 has 4 divisors (see below), whose sum is σ = 27104348130. Its totient is φ = 9034782708.

The previous prime is 18069565403. The next prime is 18069565477. The reversal of 18069565418 is 81456596081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81456596081 = 7 ⋅11636656583.

It can be written as a sum of positive squares in only one way, i.e., 13861059289 + 4208506129 = 117733^2 + 64873^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18069565418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4517391353 + ... + 4517391356.

Almost surely, 2^18069565418 is an apocalyptic number.

18069565418 is a deficient number, since it is larger than the sum of its proper divisors (9034782712).

18069565418 is an equidigital number, since it uses as much as digits as its factorization.

18069565418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9034782711.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 18069565418 in words is "eighteen billion, sixty-nine million, five hundred sixty-five thousand, four hundred eighteen".