18030629 has 2 divisors, whose sum is σ = 18030630. Its totient is φ = 18030628.

The previous prime is 18030589. The next prime is 18030637. The reversal of 18030629 is 92603081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12945604 + 5085025 = 3598^2 + 2255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18030629 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 (18033629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015314 + 9015315.

It is an arithmetic number, because the mean of its divisors is an integer number (9015315).

Almost surely, 2^18030629 is an apocalyptic number.

It is an amenable number.

18030629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030629 is an equidigital number, since it uses as much as digits as its factorization.

18030629 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 29.

The square root of 18030629 is about 4246.2488151308. The cubic root of 18030629 is about 262.2227046085. Note that the first 3 decimals are identical.

The spelling of 18030629 in words is "eighteen million, thirty thousand, six hundred twenty-nine".