18730449 has 6 divisors (see below), whose sum is σ = 27055106. Its totient is φ = 12486960.

The previous prime is 18730429. The next prime is 18730469. The reversal of 18730449 is 94403781.

It is a happy number.

18730449 is a `hidden beast` number, since 187 + 30 + 449 = 666.

18730449 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (18730429) and next prime (18730469).

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 608400 = 4257^2 + 780^2 .

It is not a de Polignac number, because 18730449 - 2⁸ = 18730193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18730429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1040572 + ... + 1040589.

Almost surely, 2^18730449 is an apocalyptic number.

It is an amenable number.

18730449 is a deficient number, since it is larger than the sum of its proper divisors (8324657).

18730449 is a wasteful number, since it uses less digits than its factorization.

18730449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081167 (or 2081164 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18730449 is about 4327.8688750931. The cubic root of 18730449 is about 265.5722722376.

The spelling of 18730449 in words is "eighteen million, seven hundred thirty thousand, four hundred forty-nine".