18247133 has 2 divisors, whose sum is σ = 18247134. Its totient is φ = 18247132.

The previous prime is 18247123. The next prime is 18247147. The reversal of 18247133 is 33174281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11580409 + 6666724 = 3403^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 18247133 - 2¹² = 18243037 is a prime.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18247096 and 18247105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18247123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9123566 + 9123567.

It is an arithmetic number, because the mean of its divisors is an integer number (9123567).

Almost surely, 2^18247133 is an apocalyptic number.

It is an amenable number.

18247133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18247133 is an equidigital number, since it uses as much as digits as its factorization.

18247133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 18247133 is about 4271.6663025101. Note that the first 3 decimals coincide. The cubic root of 18247133 is about 263.2680838532.

The spelling of 18247133 in words is "eighteen million, two hundred forty-seven thousand, one hundred thirty-three".