18334218208 has 48 divisors (see below), whose sum is σ = 38271728880. Its totient is φ = 8615909376.

The previous prime is 18334218197. The next prime is 18334218211. The reversal of 18334218208 is 80281243381.

It is a happy number.

It is a super-2 number, since 2×18334218208² (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, 375763 + ... + 421741.

It is an arithmetic number, because the mean of its divisors is an integer number (797327685).

Almost surely, 2^18334218208 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 18334218208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19135864440).

18334218208 is an abundant number, since it is smaller than the sum of its proper divisors (19937510672).

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

18334218208 is a wasteful number, since it uses less digits than its factorization.

18334218208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46739 (or 46731 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 18334218208 in words is "eighteen billion, three hundred thirty-four million, two hundred eighteen thousand, two hundred eight".