18218384000 has 64 divisors (see below), whose sum is σ = 45295497000. Its totient is φ = 7287347200.

The previous prime is 18218383991. The next prime is 18218384057. The reversal of 18218384000 is 48381281.

It can be written as a sum of positive squares in 4 ways, for example, as 3351946816 + 14866437184 = 57896^2 + 121928^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 553325 + ... + 585324.

Almost surely, 2^18218384000 is an apocalyptic number.

18218384000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18218384000 is an abundant number, since it is smaller than the sum of its proper divisors (27077113000).

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

18218384000 is an equidigital number, since it uses as much as digits as its factorization.

18218384000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138678 (or 1138656 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 18218384000 in words is "eighteen billion, two hundred eighteen million, three hundred eighty-four thousand".