18449530 has 32 divisors (see below), whose sum is σ = 36469440. Its totient is φ = 6664320.

The previous prime is 18449507. The next prime is 18449531. The reversal of 18449530 is 3594481.

It is not an unprimeable number, because it can be changed into a prime (18449531) 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 15 ways as a sum of consecutive naturals, for example, 19222 + ... + 20158.

It is an arithmetic number, because the mean of its divisors is an integer number (1139670).

Almost surely, 2^18449530 is an apocalyptic number.

18449530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18449530 is a deficient number, since it is larger than the sum of its proper divisors (18019910).

18449530 is a wasteful number, since it uses less digits than its factorization.

18449530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18449530 is about 4295.2916082613. The cubic root of 18449530 is about 264.2378958321.

The spelling of 18449530 in words is "eighteen million, four hundred forty-nine thousand, five hundred thirty".