18354513608 has 36 divisors (see below), whose sum is σ = 36335758545. Its totient is φ = 8690794560.

The previous prime is 18354513601. The next prime is 18354513631. The reversal of 18354513608 is 80631545381.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 9693977764 + 8660535844 = 98458^2 + 93062^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95798.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18354513601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7279388 + ... + 7281908.

Almost surely, 2^18354513608 is an apocalyptic number.

It is an amenable number.

18354513608 is a deficient number, since it is larger than the sum of its proper divisors (17981244937).

18354513608 is an frugal number, since it uses more digits than its factorization.

18354513608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 18354513608 in words is "eighteen billion, three hundred fifty-four million, five hundred thirteen thousand, six hundred eight".