18069629 has 2 divisors, whose sum is σ = 18069630. Its totient is φ = 18069628.

The previous prime is 18069619. The next prime is 18069641. The reversal of 18069629 is 92696081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16826404 + 1243225 = 4102^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 18069629 - 2⁴ = 18069613 is a prime.

It is a super-2 number, since 2×18069629² = 653022984395282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18069619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9034814 + 9034815.

It is an arithmetic number, because the mean of its divisors is an integer number (9034815).

Almost surely, 2^18069629 is an apocalyptic number.

It is an amenable number.

18069629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18069629 is an equidigital number, since it uses as much as digits as its factorization.

18069629 is an evil number, because the sum of its binary digits is even.

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

The square root of 18069629 is about 4250.8386231425. The cubic root of 18069629 is about 262.4116298153.

The spelling of 18069629 in words is "eighteen million, sixty-nine thousand, six hundred twenty-nine".