18446718888 has 384 divisors, whose sum is σ = 58672373760. Its totient is φ = 5189184000.

The previous prime is 18446718863. The next prime is 18446718889. The reversal of 18446718888 is 88881764481.

18446718888 is a `hidden beast` number, since 1 + 8 + 446 + 7 + 188 + 8 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18446718889) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 87425103 + ... + 87425313.

It is an arithmetic number, because the mean of its divisors is an integer number (152792640).

Almost surely, 2^18446718888 is an apocalyptic number.

18446718888 is a gapful number since it is divisible by the number (18) 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 18446718888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29336186880).

18446718888 is an abundant number, since it is smaller than the sum of its proper divisors (40225654872).

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

18446718888 is a wasteful number, since it uses less digits than its factorization.

18446718888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 414 counting only the distinct ones).

The product of its digits is 22020096, while the sum is 63.

The spelling of 18446718888 in words is "eighteen billion, four hundred forty-six million, seven hundred eighteen thousand, eight hundred eighty-eight".