18966474552420 has 480 divisors, whose sum is σ = 60910136179200. Its totient is φ = 4938984999936.

The previous prime is 18966474552401. The next prime is 18966474552427. The reversal of 18966474552420 is 2425547466981.

18966474552420 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 6 + 4 + 74 + 552 + 4 + 2 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (18966474552427) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 14292745797 + ... + 14292747123.

It is an arithmetic number, because the mean of its divisors is an integer number (126896117040).

Almost surely, 2^{18966474552420} is an apocalyptic number.

18966474552420 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 18966474552420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30455068089600).

18966474552420 is an abundant number, since it is smaller than the sum of its proper divisors (41943661626780).

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

18966474552420 is a wasteful number, since it uses less digits than its factorization.

18966474552420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 63.

The spelling of 18966474552420 in words is "eighteen trillion, nine hundred sixty-six billion, four hundred seventy-four million, five hundred fifty-two thousand, four hundred twenty".