18340797888 has 336 divisors, whose sum is σ = 66967729920. Its totient is φ = 4672069632.

The previous prime is 18340797877. The next prime is 18340797901. The reversal of 18340797888 is 88879704381.

18340797888 is a `hidden beast` number, since 1 + 83 + 407 + 9 + 78 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1295295 + ... + 1309377.

It is an arithmetic number, because the mean of its divisors is an integer number (199308720).

Almost surely, 2^18340797888 is an apocalyptic number.

18340797888 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 18340797888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33483864960).

18340797888 is an abundant number, since it is smaller than the sum of its proper divisors (48626932032).

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

18340797888 is a wasteful number, since it uses less digits than its factorization.

18340797888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14144 (or 14131 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 18340797888 in words is "eighteen billion, three hundred forty million, seven hundred ninety-seven thousand, eight hundred eighty-eight".