18233449 has 8 divisors (see below), whose sum is σ = 19958792. Its totient is φ = 16554240.

The previous prime is 18233443. The next prime is 18233461. The reversal of 18233449 is 94433281.

It can be written as a sum of positive squares in 4 ways, for example, as 85849 + 18147600 = 293^2 + 4260^2 .

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 18233449 - 2⁹ = 18232937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18233443) 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 7 ways as a sum of consecutive naturals, for example, 10704 + ... + 12289.

It is an arithmetic number, because the mean of its divisors is an integer number (2494849).

Almost surely, 2^18233449 is an apocalyptic number.

It is an amenable number.

18233449 is a deficient number, since it is larger than the sum of its proper divisors (1725343).

18233449 is a wasteful number, since it uses less digits than its factorization.

18233449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23067.

The product of its digits is 20736, while the sum is 34.

The square root of 18233449 is about 4270.0642852304. The cubic root of 18233449 is about 263.2022568657.

The spelling of 18233449 in words is "eighteen million, two hundred thirty-three thousand, four hundred forty-nine".