18450649 has 8 divisors (see below), whose sum is σ = 21535488. Its totient is φ = 15478080.

The previous prime is 18450647. The next prime is 18450667. The reversal of 18450649 is 94605481.

It is a happy number.

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 18450649 - 2¹ = 18450647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18450647) 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, 27712 + ... + 28369.

It is an arithmetic number, because the mean of its divisors is an integer number (2691936).

Almost surely, 2^18450649 is an apocalyptic number.

It is an amenable number.

18450649 is a deficient number, since it is larger than the sum of its proper divisors (3084839).

18450649 is an equidigital number, since it uses as much as digits as its factorization.

18450649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56135.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18450649 is about 4295.4218651955. The cubic root of 18450649 is about 264.2432379055.

The spelling of 18450649 in words is "eighteen million, four hundred fifty thousand, six hundred forty-nine".