18671049 has 12 divisors (see below), whose sum is σ = 28555956. Its totient is φ = 11715072.

The previous prime is 18671047. The next prime is 18671071. The reversal of 18671049 is 94017681.

It can be written as a sum of positive squares in 2 ways, for example, as 14197824 + 4473225 = 3768^2 + 2115^2 .

It is not a de Polignac number, because 18671049 - 2¹ = 18671047 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18671047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60864 + ... + 61169.

It is an arithmetic number, because the mean of its divisors is an integer number (2379663).

Almost surely, 2^18671049 is an apocalyptic number.

It is an amenable number.

18671049 is a deficient number, since it is larger than the sum of its proper divisors (9884907).

18671049 is a wasteful number, since it uses less digits than its factorization.

18671049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122056 (or 122053 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18671049 is about 4321.0009257115. Note that the first 3 decimals coincide. The cubic root of 18671049 is about 265.2912378962.

It can be divided in two parts, 1867 and 1049, that added together give a square (2916 = 54²).

The spelling of 18671049 in words is "eighteen million, six hundred seventy-one thousand, forty-nine".