18944282880 has 432 divisors, whose sum is σ = 70711280640. Its totient is φ = 4666982400.

The previous prime is 18944282867. The next prime is 18944282881. The reversal of 18944282880 is 8828244981.

It is a super-2 number, since 2×18944282880² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944282881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8973025 + ... + 8975135.

It is an arithmetic number, because the mean of its divisors is an integer number (163683520).

Almost surely, 2^18944282880 is an apocalyptic number.

18944282880 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 18944282880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35355640320).

18944282880 is an abundant number, since it is smaller than the sum of its proper divisors (51766997760).

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

18944282880 is a wasteful number, since it uses less digits than its factorization.

18944282880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The spelling of 18944282880 in words is "eighteen billion, nine hundred forty-four million, two hundred eighty-two thousand, eight hundred eighty".