18448390325508 has 432 divisors, whose sum is σ = 53593076073600. Its totient is φ = 4923972218880.

The previous prime is 18448390325503. The next prime is 18448390325513. The reversal of 18448390325508 is 80552309384481.

It is an interprime number because it is at equal distance from previous prime (18448390325503) and next prime (18448390325513).

It is not an unprimeable number, because it can be changed into a prime (18448390325501) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2443815318 + ... + 2443822866.

Almost surely, 2^{18448390325508} 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 18448390325508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26796538036800).

18448390325508 is an abundant number, since it is smaller than the sum of its proper divisors (35144685748092).

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

18448390325508 is a wasteful number, since it uses less digits than its factorization.

18448390325508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060 (or 8034 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 60.

The spelling of 18448390325508 in words is "eighteen trillion, four hundred forty-eight billion, three hundred ninety million, three hundred twenty-five thousand, five hundred eight".