18055847 has 2 divisors, whose sum is σ = 18055848. Its totient is φ = 18055846.

The previous prime is 18055841. The next prime is 18055859. The reversal of 18055847 is 74855081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18055847 - 2⁶ = 18055783 is a prime.

It is a super-2 number, since 2×18055847² = 652027221774818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18055847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18055841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027923 + 9027924.

It is an arithmetic number, because the mean of its divisors is an integer number (9027924).

Almost surely, 2^18055847 is an apocalyptic number.

18055847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18055847 is an equidigital number, since it uses as much as digits as its factorization.

18055847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 18055847 is about 4249.2172220304. The cubic root of 18055847 is about 262.3448976401.

The spelling of 18055847 in words is "eighteen million, fifty-five thousand, eight hundred forty-seven".