18012847 has 2 divisors, whose sum is σ = 18012848. Its totient is φ = 18012846.

The previous prime is 18012793. The next prime is 18012853. The reversal of 18012847 is 74821081.

It is a strong prime.

It is an emirp because it is prime and its reverse (74821081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18012847 - 2⁷ = 18012719 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18012047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006423 + 9006424.

It is an arithmetic number, because the mean of its divisors is an integer number (9006424).

Almost surely, 2^18012847 is an apocalyptic number.

18012847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012847 is an equidigital number, since it uses as much as digits as its factorization.

18012847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18012847 is about 4244.1544505355. The cubic root of 18012847 is about 262.1364739724.

The spelling of 18012847 in words is "eighteen million, twelve thousand, eight hundred forty-seven".