18440008880 has 20 divisors (see below), whose sum is σ = 42873020832. Its totient is φ = 7376003520.

The previous prime is 18440008861. The next prime is 18440008889. The reversal of 18440008880 is 8880004481.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (18440008889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115249976 + ... + 115250135.

Almost surely, 2^18440008880 is an apocalyptic number.

18440008880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18440008880 is an abundant number, since it is smaller than the sum of its proper divisors (24433011952).

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

18440008880 is a wasteful number, since it uses less digits than its factorization.

18440008880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230500124 (or 230500118 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 41.

The spelling of 18440008880 in words is "eighteen billion, four hundred forty million, eight thousand, eight hundred eighty".