18383021056 has 99 divisors (see below), whose sum is σ = 38958694371. Its totient is φ = 8668698624.

The previous prime is 18383021039. The next prime is 18383021089. The reversal of 18383021056 is 65012038381.

The square root of 18383021056 is 135584.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 82434961 + ... + 82435183.

Almost surely, 2^18383021056 is an apocalyptic number.

18383021056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18383021056 is the 135584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18383021056

18383021056 is an abundant number, since it is smaller than the sum of its proper divisors (20575673315).

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

18383021056 is an frugal number, since it uses more digits than its factorization.

18383021056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 18383021056 in words is "eighteen billion, three hundred eighty-three million, twenty-one thousand, fifty-six".