18450049 has 6 divisors (see below), whose sum is σ = 19599494. Its totient is φ = 17364480.

The previous prime is 18450043. The next prime is 18450059. The reversal of 18450049 is 94005481.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8809024 + 9641025 = 2968^2 + 3105^2 .

It is not a de Polignac number, because 18450049 - 2¹⁵ = 18417281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18450049.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450043) 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, 31632 + ... + 32209.

Almost surely, 2^18450049 is an apocalyptic number.

It is an amenable number.

18450049 is a deficient number, since it is larger than the sum of its proper divisors (1149445).

18450049 is an equidigital number, since it uses as much as digits as its factorization.

18450049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63875 (or 63858 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18450049 is about 4295.3520228265. The cubic root of 18450049 is about 264.2403735499.

The spelling of 18450049 in words is "eighteen million, four hundred fifty thousand, forty-nine".