18947304576 has 192 divisors, whose sum is σ = 57899233080. Its totient is φ = 5926846464.

The previous prime is 18947304503. The next prime is 18947304587. The reversal of 18947304576 is 67540374981.

18947304576 is a `hidden beast` number, since 189 + 4 + 7 + 3 + 0 + 457 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18707674176 + 239630400 = 136776^2 + 15480^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7773630 + ... + 7776066.

Almost surely, 2^18947304576 is an apocalyptic number.

18947304576 is a gapful number since it is divisible by the number (16) 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 18947304576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28949616540).

18947304576 is an abundant number, since it is smaller than the sum of its proper divisors (38951928504).

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

18947304576 is a wasteful number, since it uses less digits than its factorization.

18947304576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871 (or 2856 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 18947304576 in words is "eighteen billion, nine hundred forty-seven million, three hundred four thousand, five hundred seventy-six".