18183820220388 has 36 divisors (see below), whose sum is σ = 46058271085008. Its totient is φ = 6048928648560.

The previous prime is 18183820220359. The next prime is 18183820220407. The reversal of 18183820220388 is 88302202838181.

18183820220388 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 38 + 2 + 0 + 220 + 388 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514347006 + ... + 514382357.

It is an arithmetic number, because the mean of its divisors is an integer number (1279396419028).

Almost surely, 2^{18183820220388} is an apocalyptic number.

18183820220388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18183820220388 is an abundant number, since it is smaller than the sum of its proper divisors (27874450864620).

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

18183820220388 is a wasteful number, since it uses less digits than its factorization.

18183820220388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028729864 (or 1028729859 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The spelling of 18183820220388 in words is "eighteen trillion, one hundred eighty-three billion, eight hundred twenty million, two hundred twenty thousand, three hundred eighty-eight".