18222718800 has 480 divisors, whose sum is σ = 69311563776. Its totient is φ = 4034304000.

The previous prime is 18222718793. The next prime is 18222718831. The reversal of 18222718800 is 881722281.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 17674285 + ... + 17675315.

Almost surely, 2^18222718800 is an apocalyptic number.

18222718800 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 18222718800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34655781888).

18222718800 is an abundant number, since it is smaller than the sum of its proper divisors (51088844976).

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

18222718800 is a wasteful number, since it uses less digits than its factorization.

18222718800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 39.

The spelling of 18222718800 in words is "eighteen billion, two hundred twenty-two million, seven hundred eighteen thousand, eight hundred".