18230711 has 2 divisors, whose sum is σ = 18230712. Its totient is φ = 18230710.

The previous prime is 18230687. The next prime is 18230717. The reversal of 18230711 is 11703281.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11703281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18230711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18230717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115355 + 9115356.

It is an arithmetic number, because the mean of its divisors is an integer number (9115356).

Almost surely, 2^18230711 is an apocalyptic number.

18230711 is a deficient number, since it is larger than the sum of its proper divisors (1).

18230711 is an equidigital number, since it uses as much as digits as its factorization.

18230711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18230711 is about 4269.7436691211. The cubic root of 18230711 is about 263.1890817418.

Adding to 18230711 its reverse (11703281), we get a palindrome (29933992).

The spelling of 18230711 in words is "eighteen million, two hundred thirty thousand, seven hundred eleven".