18055699200 has 1728 divisors, whose sum is σ = 87594393600. Its totient is φ = 3527884800.

The previous prime is 18055699159. The next prime is 18055699229. The reversal of 18055699200 is 299655081.

18055699200 is a `hidden beast` number, since 1 + 8 + 0 + 556 + 9 + 92 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1728).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 306028771 + ... + 306028829.

It is an arithmetic number, because the mean of its divisors is an integer number (50691200).

Almost surely, 2^18055699200 is an apocalyptic number.

18055699200 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 18055699200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43797196800).

18055699200 is an abundant number, since it is smaller than the sum of its proper divisors (69538694400).

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

18055699200 is a wasteful number, since it uses less digits than its factorization.

18055699200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 18055699200 in words is "eighteen billion, fifty-five million, six hundred ninety-nine thousand, two hundred".