18616886400 has 768 divisors, whose sum is σ = 74582726400. Its totient is φ = 3991142400.

The previous prime is 18616886279. The next prime is 18616886417. The reversal of 18616886400 is 468861681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18616886400.

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 95 ways as a sum of consecutive naturals, for example, 79900684 + ... + 79900916.

It is an arithmetic number, because the mean of its divisors is an integer number (97112925).

Almost surely, 2^18616886400 is an apocalyptic number.

18616886400 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 18616886400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37291363200).

18616886400 is an abundant number, since it is smaller than the sum of its proper divisors (55965840000).

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

18616886400 is a wasteful number, since it uses less digits than its factorization.

18616886400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 18616886400 in words is "eighteen billion, six hundred sixteen million, eight hundred eighty-six thousand, four hundred".