18249946 has 24 divisors (see below), whose sum is σ = 32409972. Its totient is φ = 7656000.

The previous prime is 18249941. The next prime is 18249947. The reversal of 18249946 is 64994281.

It can be written as a sum of positive squares in 2 ways, for example, as 17935225 + 314721 = 4235^2 + 561^2 .

It is not an unprimeable number, because it can be changed into a prime (18249941) 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 11 ways as a sum of consecutive naturals, for example, 246 + ... + 6046.

Almost surely, 2^18249946 is an apocalyptic number.

18249946 is a deficient number, since it is larger than the sum of its proper divisors (14160026).

18249946 is a wasteful number, since it uses less digits than its factorization.

18249946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838 (or 5827 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 18249946 is about 4271.9955524321. The cubic root of 18249946 is about 263.2816117330.

The spelling of 18249946 in words is "eighteen million, two hundred forty-nine thousand, nine hundred forty-six".