18904846473 has 16 divisors (see below), whose sum is σ = 28048213440. Its totient is φ = 12584765952.

The previous prime is 18904846469. The next prime is 18904846483. The reversal of 18904846473 is 37464840981.

18904846473 is a `hidden beast` number, since 1 + 8 + 90 + 4 + 84 + 6 + 473 = 666.

It is not a de Polignac number, because 18904846473 - 2² = 18904846469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18904846403) 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 15 ways as a sum of consecutive naturals, for example, 494136 + ... + 531017.

It is an arithmetic number, because the mean of its divisors is an integer number (1753013340).

Almost surely, 2^18904846473 is an apocalyptic number.

It is an amenable number.

18904846473 is a deficient number, since it is larger than the sum of its proper divisors (9143366967).

18904846473 is a wasteful number, since it uses less digits than its factorization.

18904846473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025845 (or 1025839 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 18904846473 in words is "eighteen billion, nine hundred four million, eight hundred forty-six thousand, four hundred seventy-three".