18198206208 has 864 divisors, whose sum is σ = 69372051840. Its totient is φ = 4459069440.

The previous prime is 18198206197. The next prime is 18198206287. The reversal of 18198206208 is 80260289181.

It is a happy number.

18198206208 is a `hidden beast` number, since 1 + 8 + 19 + 8 + 2 + 0 + 620 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 249290460 + ... + 249290532.

Almost surely, 2^18198206208 is an apocalyptic number.

18198206208 is a gapful number since it is divisible by the number (18) 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 18198206208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34686025920).

18198206208 is an abundant number, since it is smaller than the sum of its proper divisors (51173845632).

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

18198206208 is a wasteful number, since it uses less digits than its factorization.

18198206208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 18198206208 in words is "eighteen billion, one hundred ninety-eight million, two hundred six thousand, two hundred eight".