18122843 has 2 divisors, whose sum is σ = 18122844. Its totient is φ = 18122842.

The previous prime is 18122813. The next prime is 18122851. The reversal of 18122843 is 34822181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18122843 - 2¹⁶ = 18057307 is a prime.

It is a super-3 number, since 3×18122843³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18122813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9061421 + 9061422.

It is an arithmetic number, because the mean of its divisors is an integer number (9061422).

Almost surely, 2^18122843 is an apocalyptic number.

18122843 is a deficient number, since it is larger than the sum of its proper divisors (1).

18122843 is an equidigital number, since it uses as much as digits as its factorization.

18122843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 18122843 is about 4257.0932571415. The cubic root of 18122843 is about 262.6689729915.

The spelling of 18122843 in words is "eighteen million, one hundred twenty-two thousand, eight hundred forty-three".