18468293 has 2 divisors, whose sum is σ = 18468294. Its totient is φ = 18468292.

The previous prime is 18468283. The next prime is 18468311. The reversal of 18468293 is 39286481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 209764 = 4273^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 18468293 - 2¹² = 18464197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18468293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18468253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234146 + 9234147.

It is an arithmetic number, because the mean of its divisors is an integer number (9234147).

Almost surely, 2^18468293 is an apocalyptic number.

It is an amenable number.

18468293 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468293 is an equidigital number, since it uses as much as digits as its factorization.

18468293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 18468293 is about 4297.4751889918. The cubic root of 18468293 is about 264.3274413089.

The spelling of 18468293 in words is "eighteen million, four hundred sixty-eight thousand, two hundred ninety-three".