18883849 has 2 divisors, whose sum is σ = 18883850. Its totient is φ = 18883848.

The previous prime is 18883841. The next prime is 18883873. The reversal of 18883849 is 94838881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 2016400 = 4107^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 18883849 - 2³ = 18883841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18883841) 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, 9441924 + 9441925.

It is an arithmetic number, because the mean of its divisors is an integer number (9441925).

Almost surely, 2^18883849 is an apocalyptic number.

It is an amenable number.

18883849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18883849 is an equidigital number, since it uses as much as digits as its factorization.

18883849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 442368, while the sum is 49.

The square root of 18883849 is about 4345.5550853717. Note that the first 3 decimals coincide. The cubic root of 18883849 is about 266.2953030393.

The spelling of 18883849 in words is "eighteen million, eight hundred eighty-three thousand, eight hundred forty-nine".