18426578688 has 216 divisors, whose sum is σ = 61866631008. Its totient is φ = 5165162496.

The previous prime is 18426578669. The next prime is 18426578699. The reversal of 18426578688 is 88687562481.

18426578688 is a `hidden beast` number, since 1 + 8 + 426 + 57 + 86 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 844006 + ... + 865562.

It is an arithmetic number, because the mean of its divisors is an integer number (286419588).

Almost surely, 2^18426578688 is an apocalyptic number.

18426578688 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 18426578688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30933315504).

18426578688 is an abundant number, since it is smaller than the sum of its proper divisors (43440052320).

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

18426578688 is a wasteful number, since it uses less digits than its factorization.

18426578688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21639 (or 21622 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 18426578688 in words is "eighteen billion, four hundred twenty-six million, five hundred seventy-eight thousand, six hundred eighty-eight".