18022847 has 2 divisors, whose sum is σ = 18022848. Its totient is φ = 18022846.

The previous prime is 18022843. The next prime is 18022859. The reversal of 18022847 is 74822081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18022847 - 2² = 18022843 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18022843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9011423 + 9011424.

It is an arithmetic number, because the mean of its divisors is an integer number (9011424).

Almost surely, 2^18022847 is an apocalyptic number.

18022847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18022847 is an equidigital number, since it uses as much as digits as its factorization.

18022847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18022847 is about 4245.3323780359. The cubic root of 18022847 is about 262.1849741678.

The spelling of 18022847 in words is "eighteen million, twenty-two thousand, eight hundred forty-seven".