18006229648 has 40 divisors (see below), whose sum is σ = 38069795520. Its totient is φ = 8182247040.

The previous prime is 18006229613. The next prime is 18006229649. The reversal of 18006229648 is 84692260081.

It is a super-2 number, since 2×18006229648² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18006229598 and 18006229607.

It is not an unprimeable number, because it can be changed into a prime (18006229649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676333 + ... + 702451.

It is an arithmetic number, because the mean of its divisors is an integer number (951744888).

Almost surely, 2^18006229648 is an apocalyptic number.

It is an amenable number.

18006229648 is an abundant number, since it is smaller than the sum of its proper divisors (20063565872).

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

18006229648 is a wasteful number, since it uses less digits than its factorization.

18006229648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30055 (or 30049 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 18006229648 in words is "eighteen billion, six million, two hundred twenty-nine thousand, six hundred forty-eight".