18051770880 has 480 divisors, whose sum is σ = 73461548160. Its totient is φ = 4038819840.

The previous prime is 18051770843. The next prime is 18051770923. The reversal of 18051770880 is 8807715081.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 3291981 + ... + 3297459.

It is an arithmetic number, because the mean of its divisors is an integer number (153044892).

Almost surely, 2^18051770880 is an apocalyptic number.

18051770880 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 18051770880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36730774080).

18051770880 is an abundant number, since it is smaller than the sum of its proper divisors (55409777280).

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

18051770880 is a wasteful number, since it uses less digits than its factorization.

18051770880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532 (or 5513 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The spelling of 18051770880 in words is "eighteen billion, fifty-one million, seven hundred seventy thousand, eight hundred eighty".