18886849 has 2 divisors, whose sum is σ = 18886850. Its totient is φ = 18886848.

The previous prime is 18886837. The next prime is 18886867. The reversal of 18886849 is 94868881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10036224 + 8850625 = 3168^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 18886849 - 2²¹ = 16789697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18886796 and 18886805.

It is not a weakly prime, because it can be changed into another prime (18886349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9443424 + 9443425.

It is an arithmetic number, because the mean of its divisors is an integer number (9443425).

Almost surely, 2^18886849 is an apocalyptic number.

It is an amenable number.

18886849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18886849 is an equidigital number, since it uses as much as digits as its factorization.

18886849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 52.

The square root of 18886849 is about 4345.9002519616. The cubic root of 18886849 is about 266.3094040418.

The spelling of 18886849 in words is "eighteen million, eight hundred eighty-six thousand, eight hundred forty-nine".