18204029 has 2 divisors, whose sum is σ = 18204030. Its totient is φ = 18204028.

The previous prime is 18203947. The next prime is 18204077. The reversal of 18204029 is 92040281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 2244004 = 3995^2 + 1498^2 .

It is an emirp because it is prime and its reverse (92040281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18204029 - 2¹⁶ = 18138493 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18203989 and 18204007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18204079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102014 + 9102015.

It is an arithmetic number, because the mean of its divisors is an integer number (9102015).

Almost surely, 2^18204029 is an apocalyptic number.

It is an amenable number.

18204029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18204029 is an equidigital number, since it uses as much as digits as its factorization.

18204029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18204029 is about 4266.6179814931. The cubic root of 18204029 is about 263.0606201254.

The spelling of 18204029 in words is "eighteen million, two hundred four thousand, twenty-nine".