18947684212200 has 144 divisors (see below), whose sum is σ = 63672099105420. Its totient is φ = 5049582520320.

The previous prime is 18947684212199. The next prime is 18947684212217. The reversal of 18947684212200 is 221248674981.

18947684212200 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 7 + 6 + 8 + 421 + 2 + 200 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3713197965156 + 15234486247044 = 1926966^2 + 3903138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 359617 + ... + 6166416.

Almost surely, 2^{18947684212200} is an apocalyptic number.

18947684212200 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 18947684212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31836049552710).

18947684212200 is an abundant number, since it is smaller than the sum of its proper divisors (44724414893220).

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

18947684212200 is a wasteful number, since it uses less digits than its factorization.

18947684212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6527668 (or 6527656 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 18947684212200 in words is "eighteen trillion, nine hundred forty-seven billion, six hundred eighty-four million, two hundred twelve thousand, two hundred".