18349853 has 2 divisors, whose sum is σ = 18349854. Its totient is φ = 18349852.

The previous prime is 18349829. The next prime is 18349867. The reversal of 18349853 is 35894381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12694969 + 5654884 = 3563^2 + 2378^2 .

It is an emirp because it is prime and its reverse (35894381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18349853 - 2¹⁰ = 18348829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18349853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18349873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174926 + 9174927.

It is an arithmetic number, because the mean of its divisors is an integer number (9174927).

Almost surely, 2^18349853 is an apocalyptic number.

It is an amenable number.

18349853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349853 is an equidigital number, since it uses as much as digits as its factorization.

18349853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 18349853 is about 4283.6728399821. The cubic root of 18349853 is about 263.7611715580.

The spelling of 18349853 in words is "eighteen million, three hundred forty-nine thousand, eight hundred fifty-three".