18449073 has 8 divisors (see below), whose sum is σ = 27332000. Its totient is φ = 12299364.

The previous prime is 18449069. The next prime is 18449089. The reversal of 18449073 is 37094481.

It is a happy number.

It is not a de Polignac number, because 18449073 - 2² = 18449069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18449003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341623 + ... + 341676.

It is an arithmetic number, because the mean of its divisors is an integer number (3416500).

Almost surely, 2^18449073 is an apocalyptic number.

It is an amenable number.

18449073 is a deficient number, since it is larger than the sum of its proper divisors (8882927).

18449073 is an equidigital number, since it uses as much as digits as its factorization.

18449073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683308 (or 683302 counting only the distinct ones).

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

The square root of 18449073 is about 4295.2384101468. The cubic root of 18449073 is about 264.2357140654.

The spelling of 18449073 in words is "eighteen million, four hundred forty-nine thousand, seventy-three".