18554218000 has 40 divisors (see below), whose sum is σ = 44864103960. Its totient is φ = 7421686400.

The previous prime is 18554217977. The next prime is 18554218003. The reversal of 18554218000 is 81245581.

It can be written as a sum of positive squares in 4 ways, for example, as 5758988544 + 12795229456 = 75888^2 + 113116^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18554218003) 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, 4636555 + ... + 4640554.

It is an arithmetic number, because the mean of its divisors is an integer number (1121602599).

Almost surely, 2^18554218000 is an apocalyptic number.

18554218000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18554218000 is an abundant number, since it is smaller than the sum of its proper divisors (26309885960).

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

18554218000 is an equidigital number, since it uses as much as digits as its factorization.

18554218000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9277132 (or 9277116 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 34.

The spelling of 18554218000 in words is "eighteen billion, five hundred fifty-four million, two hundred eighteen thousand".