18499712 has 64 divisors (see below), whose sum is σ = 45973440. Its totient is φ = 7203840.

The previous prime is 18499699. The next prime is 18499729. The reversal of 18499712 is 21799481.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 18499712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8918 + ... + 10794.

It is an arithmetic number, because the mean of its divisors is an integer number (718335).

Almost surely, 2^18499712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18499712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22986720).

18499712 is an abundant number, since it is smaller than the sum of its proper divisors (27473728).

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

18499712 is a wasteful number, since it uses less digits than its factorization.

18499712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1897 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 18499712 is about 4301.1291540711. The cubic root of 18499712 is about 264.4772511980.

The spelling of 18499712 in words is "eighteen million, four hundred ninety-nine thousand, seven hundred twelve".