18550249 has 9 divisors (see below), whose sum is σ = 19132023. Its totient is φ = 17986032.

The previous prime is 18550237. The next prime is 18550261. The reversal of 18550249 is 94205581.

The square root of 18550249 is 4307.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (18550237) and next prime (18550261).

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 8020224 = 3245^2 + 2832^2 .

It is not a de Polignac number, because 18550249 - 2¹⁹ = 18025961 is a prime.

It is a super-2 number, since 2×18550249² = 688223475924002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18550219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 254077 + ... + 254149.

Almost surely, 2^18550249 is an apocalyptic number.

18550249 is the 4307-th square number.

18550249 is the 2154-th centered octagonal number.

It is an amenable number.

18550249 is a deficient number, since it is larger than the sum of its proper divisors (581774).

18550249 is an frugal number, since it uses more digits than its factorization.

18550249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The cubic root of 18550249 is about 264.7178627712.

Multiplying 18550249 by its product of nonzero digits (14400), we get a square (267123585600 = 516840²).

The spelling of 18550249 in words is "eighteen million, five hundred fifty thousand, two hundred forty-nine".