18180049 has 8 divisors (see below), whose sum is σ = 18504288. Its totient is φ = 17858880.

The previous prime is 18179983. The next prime is 18180059. The reversal of 18180049 is 94008181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18180049 - 2⁷ = 18179921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18180049.

It is not an unprimeable number, because it can be changed into a prime (18180059) 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 7 ways as a sum of consecutive naturals, for example, 13369 + ... + 14665.

It is an arithmetic number, because the mean of its divisors is an integer number (2313036).

Almost surely, 2^18180049 is an apocalyptic number.

It is an amenable number.

18180049 is a deficient number, since it is larger than the sum of its proper divisors (324239).

18180049 is a wasteful number, since it uses less digits than its factorization.

18180049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18180049 is about 4263.8068671083. The cubic root of 18180049 is about 262.9450602566.

The spelling of 18180049 in words is "eighteen million, one hundred eighty thousand, forty-nine".