18680049 has 24 divisors (see below), whose sum is σ = 27755520. Its totient is φ = 12102048.

The previous prime is 18680047. The next prime is 18680083. The reversal of 18680049 is 94008681.

It is a happy number.

It is not a de Polignac number, because 18680049 - 2¹ = 18680047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18679995 and 18680022.

It is not an unprimeable number, because it can be changed into a prime (18680047) 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 in 23 ways as a sum of consecutive naturals, for example, 67299 + ... + 67575.

It is an arithmetic number, because the mean of its divisors is an integer number (1156480).

Almost surely, 2^18680049 is an apocalyptic number.

It is an amenable number.

18680049 is a deficient number, since it is larger than the sum of its proper divisors (9075471).

18680049 is a wasteful number, since it uses less digits than its factorization.

18680049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18680049 is about 4322.0422256151. The cubic root of 18680049 is about 265.3338571336. Note that the first 3 decimals are identical.

The spelling of 18680049 in words is "eighteen million, six hundred eighty thousand, forty-nine".