18844812000 has 720 divisors, whose sum is σ = 80527054608. Its totient is φ = 4303756800.

The previous prime is 18844811983. The next prime is 18844812013. The reversal of 18844812000 is 21844881.

It is a happy number.

18844812000 is a `hidden beast` number, since 1 + 8 + 8 + 448 + 1 + 200 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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 polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 15875407 + ... + 15876593.

Almost surely, 2^18844812000 is an apocalyptic number.

18844812000 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 18844812000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40263527304).

18844812000 is an abundant number, since it is smaller than the sum of its proper divisors (61682242608).

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

18844812000 is a wasteful number, since it uses less digits than its factorization.

18844812000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The spelling of 18844812000 in words is "eighteen billion, eight hundred forty-four million, eight hundred twelve thousand".