18274358821608 has 320 divisors, whose sum is σ = 57061406318400. Its totient is φ = 5430153738240.

The previous prime is 18274358821603. The next prime is 18274358821681. The reversal of 18274358821608 is 80612885347281.

18274358821608 is a `hidden beast` number, since 1 + 8 + 2 + 7 + 43 + 588 + 2 + 1 + 6 + 0 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18274358821603) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1377422991 + ... + 1377436257.

It is an arithmetic number, because the mean of its divisors is an integer number (178316894745).

Almost surely, 2^{18274358821608} is an apocalyptic number.

18274358821608 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 18274358821608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28530703159200).

18274358821608 is an abundant number, since it is smaller than the sum of its proper divisors (38787047496792).

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

18274358821608 is a wasteful number, since it uses less digits than its factorization.

18274358821608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19902 (or 19889 counting only the distinct ones).

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

The spelling of 18274358821608 in words is "eighteen trillion, two hundred seventy-four billion, three hundred fifty-eight million, eight hundred twenty-one thousand, six hundred eight".