18810198000 has 320 divisors, whose sum is σ = 73510295040. Its totient is φ = 4559904000.

The previous prime is 18810197969. The next prime is 18810198023. The reversal of 18810198000 is 89101881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 578167 + ... + 609833.

It is an arithmetic number, because the mean of its divisors is an integer number (229719672).

Almost surely, 2^18810198000 is an apocalyptic number.

18810198000 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 18810198000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36755147520).

18810198000 is an abundant number, since it is smaller than the sum of its proper divisors (54700097040).

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

18810198000 is a wasteful number, since it uses less digits than its factorization.

18810198000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31710 (or 31688 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

Adding to 18810198000 its reverse (89101881), we get a palindrome (18899299881).

The spelling of 18810198000 in words is "eighteen billion, eight hundred ten million, one hundred ninety-eight thousand".