18180888880 has 240 divisors, whose sum is σ = 53469702720. Its totient is φ = 5627381760.

The previous prime is 18180888877. The next prime is 18180888889. The reversal of 18180888880 is 8888808181.

It is not an unprimeable number, because it can be changed into a prime (18180888889) 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, 10637466 + ... + 10639174.

It is an arithmetic number, because the mean of its divisors is an integer number (222790428).

Almost surely, 2^18180888880 is an apocalyptic number.

18180888880 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 18180888880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26734851360).

18180888880 is an abundant number, since it is smaller than the sum of its proper divisors (35288813840).

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

18180888880 is a wasteful number, since it uses less digits than its factorization.

18180888880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 2097152, while the sum is 58.

The spelling of 18180888880 in words is "eighteen billion, one hundred eighty million, eight hundred eighty-eight thousand, eight hundred eighty".