18348780880 has 60 divisors (see below), whose sum is σ = 42904040796. Its totient is φ = 7297920000.

The previous prime is 18348780869. The next prime is 18348780883. The reversal of 18348780880 is 8808784381.

It can be written as a sum of positive squares in 6 ways, for example, as 9259827984 + 9088952896 = 96228^2 + 95336^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348780883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2617380 + ... + 2624380.

Almost surely, 2^18348780880 is an apocalyptic number.

18348780880 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 18348780880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21452020398).

18348780880 is an abundant number, since it is smaller than the sum of its proper divisors (24555259916).

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

18348780880 is an equidigital number, since it uses as much as digits as its factorization.

18348780880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 55.

The spelling of 18348780880 in words is "eighteen billion, three hundred forty-eight million, seven hundred eighty thousand, eight hundred eighty".