18412037408 has 90 divisors (see below), whose sum is σ = 38983832559. Its totient is φ = 8560096768.

The previous prime is 18412037393. The next prime is 18412037453. The reversal of 18412037408 is 80473021481.

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 3 ways, for example, as 17724129424 + 687907984 = 133132^2 + 26228^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95948.

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 221831735 + ... + 221831817.

Almost surely, 2^18412037408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18412037408

18412037408 is an abundant number, since it is smaller than the sum of its proper divisors (20571795151).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18412037408 is an frugal number, since it uses more digits than its factorization.

18412037408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

Adding to 18412037408 its reverse (80473021481), we get a palindrome (98885058889).

The spelling of 18412037408 in words is "eighteen billion, four hundred twelve million, thirty-seven thousand, four hundred eight".