18499446 has 48 divisors (see below), whose sum is σ = 46938528. Its totient is φ = 5155200.

The previous prime is 18499433. The next prime is 18499447. The reversal of 18499446 is 64499481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499447) 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 23 ways as a sum of consecutive naturals, for example, 3376 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (977886).

Almost surely, 2^18499446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18499446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23469264).

18499446 is an abundant number, since it is smaller than the sum of its proper divisors (28439082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18499446 is a wasteful number, since it uses less digits than its factorization.

18499446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3634 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18499446 is about 4301.0982318473. The cubic root of 18499446 is about 264.4759835875.

The spelling of 18499446 in words is "eighteen million, four hundred ninety-nine thousand, four hundred forty-six".