18308441368 has 32 divisors (see below), whose sum is σ = 39592317600. Its totient is φ = 7774486272.

The previous prime is 18308441357. The next prime is 18308441383. The reversal of 18308441368 is 86314480381.

It is a happy number.

It is a super-2 number, since 2×18308441368² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493605 + ... + 1505812.

It is an arithmetic number, because the mean of its divisors is an integer number (1237259925).

Almost surely, 2^18308441368 is an apocalyptic number.

It is an amenable number.

18308441368 is an abundant number, since it is smaller than the sum of its proper divisors (21283876232).

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

18308441368 is a wasteful number, since it uses less digits than its factorization.

18308441368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999539 (or 2999535 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 18308441368 in words is "eighteen billion, three hundred eight million, four hundred forty-one thousand, three hundred sixty-eight".