18669029 has 2 divisors, whose sum is σ = 18669030. Its totient is φ = 18669028.

The previous prime is 18669017. The next prime is 18669047. The reversal of 18669029 is 92096681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 4418404 = 3775^2 + 2102^2 .

It is a cyclic number.

It is not a de Polignac number, because 18669029 - 2²⁰ = 17620453 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 (18669529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334514 + 9334515.

It is an arithmetic number, because the mean of its divisors is an integer number (9334515).

Almost surely, 2^18669029 is an apocalyptic number.

It is an amenable number.

18669029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18669029 is an equidigital number, since it uses as much as digits as its factorization.

18669029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 18669029 is about 4320.7671772499. The cubic root of 18669029 is about 265.2816703633.

The spelling of 18669029 in words is "eighteen million, six hundred sixty-nine thousand, twenty-nine".