18670853 has 2 divisors, whose sum is σ = 18670854. Its totient is φ = 18670852.

The previous prime is 18670849. The next prime is 18670859. The reversal of 18670853 is 35807681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17656804 + 1014049 = 4202^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 18670853 - 2² = 18670849 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18670859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9335426 + 9335427.

It is an arithmetic number, because the mean of its divisors is an integer number (9335427).

Almost surely, 2^18670853 is an apocalyptic number.

It is an amenable number.

18670853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18670853 is an equidigital number, since it uses as much as digits as its factorization.

18670853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18670853 is about 4320.9782457217. The cubic root of 18670853 is about 265.2903095916.

The spelling of 18670853 in words is "eighteen million, six hundred seventy thousand, eight hundred fifty-three".