18689874499800 has 216 divisors, whose sum is σ = 73014474347100. Its totient is φ = 4271971294080.

The previous prime is 18689874499787. The next prime is 18689874499847. The reversal of 18689874499800 is 899447898681.

It is a happy number.

18689874499800 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 9 + 87 + 449 + 98 + 0 + 0 = 666.

It is a super-2 number, since 2×18689874499800² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18689874499800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 105863470 + ... + 106039869.

Almost surely, 2^{18689874499800} is an apocalyptic number.

18689874499800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18689874499800 is an abundant number, since it is smaller than the sum of its proper divisors (54324599847300).

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

18689874499800 is a wasteful number, since it uses less digits than its factorization.

18689874499800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211903375 (or 211903356 counting only the distinct ones).

The product of its (nonzero) digits is 2006581248, while the sum is 81.

The spelling of 18689874499800 in words is "eighteen trillion, six hundred eighty-nine billion, eight hundred seventy-four million, four hundred ninety-nine thousand, eight hundred".