18984347 has 2 divisors, whose sum is σ = 18984348. Its totient is φ = 18984346.

The previous prime is 18984337. The next prime is 18984379. The reversal of 18984347 is 74348981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18984347 - 2⁴ = 18984331 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18984298 and 18984307.

It is not a weakly prime, because it can be changed into another prime (18984337) 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 as a sum of consecutive naturals, namely, 9492173 + 9492174.

It is an arithmetic number, because the mean of its divisors is an integer number (9492174).

Almost surely, 2^18984347 is an apocalyptic number.

18984347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18984347 is an equidigital number, since it uses as much as digits as its factorization.

18984347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 18984347 is about 4357.1030513404. The cubic root of 18984347 is about 266.7668666854.

The spelling of 18984347 in words is "eighteen million, nine hundred eighty-four thousand, three hundred forty-seven".