18027464220 has 192 divisors, whose sum is σ = 56977536000. Its totient is φ = 4731478272.

The previous prime is 18027464177. The next prime is 18027464227. The reversal of 18027464220 is 2246472081.

18027464220 is a `hidden beast` number, since 1 + 8 + 0 + 2 + 7 + 4 + 642 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027464227) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 9593241 + ... + 9595119.

It is an arithmetic number, because the mean of its divisors is an integer number (296758000).

Almost surely, 2^18027464220 is an apocalyptic number.

18027464220 is a gapful number since it is divisible by the number (10) 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 18027464220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28488768000).

18027464220 is an abundant number, since it is smaller than the sum of its proper divisors (38950071780).

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

18027464220 is a wasteful number, since it uses less digits than its factorization.

18027464220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 18027464220 in words is "eighteen billion, twenty-seven million, four hundred sixty-four thousand, two hundred twenty".