18230293 has 2 divisors, whose sum is σ = 18230294. Its totient is φ = 18230292.

The previous prime is 18230287. The next prime is 18230297. The reversal of 18230293 is 39203281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 2683044 = 3943^2 + 1638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18230293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18230297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115146 + 9115147.

It is an arithmetic number, because the mean of its divisors is an integer number (9115147).

Almost surely, 2^18230293 is an apocalyptic number.

It is an amenable number.

18230293 is a deficient number, since it is larger than the sum of its proper divisors (1).

18230293 is an equidigital number, since it uses as much as digits as its factorization.

18230293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18230293 is about 4269.6947197663. The cubic root of 18230293 is about 263.1870702298.

The spelling of 18230293 in words is "eighteen million, two hundred thirty thousand, two hundred ninety-three".