18438848325 has 18 divisors (see below), whose sum is σ = 33026026514. Its totient is φ = 9834052320.

The previous prime is 18438848291. The next prime is 18438848387. The reversal of 18438848325 is 52384883481.

18438848325 is a `hidden beast` number, since 1 + 84 + 3 + 88 + 483 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 3507719076 + 14931129249 = 59226^2 + 122193^2 .

It is not a de Polignac number, because 18438848325 - 2¹¹ = 18438846277 is a prime.

It is a super-2 number, since 2×18438848325² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40974994 + ... + 40975443.

Almost surely, 2^18438848325 is an apocalyptic number.

18438848325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18438848325 is a deficient number, since it is larger than the sum of its proper divisors (14587178189).

18438848325 is a wasteful number, since it uses less digits than its factorization.

18438848325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81950453 (or 81950445 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 54.

The spelling of 18438848325 in words is "eighteen billion, four hundred thirty-eight million, eight hundred forty-eight thousand, three hundred twenty-five".