18458236368 has 480 divisors, whose sum is σ = 65498307840. Its totient is φ = 4934476800.

The previous prime is 18458236343. The next prime is 18458236403. The reversal of 18458236368 is 86363285481.

18458236368 is a `hidden beast` number, since 1 + 8 + 45 + 8 + 236 + 368 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15628738 + ... + 15629918.

It is an arithmetic number, because the mean of its divisors is an integer number (136454808).

Almost surely, 2^18458236368 is an apocalyptic number.

18458236368 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 18458236368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32749153920).

18458236368 is an abundant number, since it is smaller than the sum of its proper divisors (47040071472).

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

18458236368 is a wasteful number, since it uses less digits than its factorization.

18458236368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1233 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 18458236368 in words is "eighteen billion, four hundred fifty-eight million, two hundred thirty-six thousand, three hundred sixty-eight".