18818000000 has 168 divisors, whose sum is σ = 47348710335. Its totient is φ = 7449600000.

The previous prime is 18817999997. The next prime is 18818000011. The reversal of 18818000000 is 81881.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 11 ways, for example, as 17081444416 + 1736555584 = 130696^2 + 41672^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 193999952 + ... + 194000048.

Almost surely, 2^18818000000 is an apocalyptic number.

18818000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18818000000

18818000000 is an abundant number, since it is smaller than the sum of its proper divisors (28530710335).

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

18818000000 is an frugal number, since it uses more digits than its factorization.

18818000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 26.

Multiplying 18818000000 by its product of nonzero digits (512), we get a square (9634816000000 = 3104000²).

Adding to 18818000000 its reverse (81881), we get a palindrome (18818081881).

The spelling of 18818000000 in words is "eighteen billion, eight hundred eighteen million", and thus it is an aban number.