18342869 has 2 divisors, whose sum is σ = 18342870. Its totient is φ = 18342868.

The previous prime is 18342859. The next prime is 18342871. The reversal of 18342869 is 96824381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 786769 = 4190^2 + 887^2 .

It is an emirp because it is prime and its reverse (96824381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18342869 - 2¹² = 18338773 is a prime.

It is a super-2 number, since 2×18342869² = 672921686302322, which contains 22 as substring.

Together with 18342871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18342859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171434 + 9171435.

It is an arithmetic number, because the mean of its divisors is an integer number (9171435).

Almost surely, 2^18342869 is an apocalyptic number.

It is an amenable number.

18342869 is a deficient number, since it is larger than the sum of its proper divisors (1).

18342869 is an equidigital number, since it uses as much as digits as its factorization.

18342869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 18342869 is about 4282.8575740970. The cubic root of 18342869 is about 263.7277045910.

The spelling of 18342869 in words is "eighteen million, three hundred forty-two thousand, eight hundred sixty-nine".