18449712 has 60 divisors (see below), whose sum is σ = 53312064. Its totient is φ = 5950080.

The previous prime is 18449707. The next prime is 18449719. The reversal of 18449712 is 21794481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18449719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2398 + ... + 6530.

Almost surely, 2^18449712 is an apocalyptic number.

18449712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18449712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26656032).

18449712 is an abundant number, since it is smaller than the sum of its proper divisors (34862352).

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

18449712 is a wasteful number, since it uses less digits than its factorization.

18449712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178 (or 4169 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18449712 is about 4295.3127941979. The cubic root of 18449712 is about 264.2387647095.

The spelling of 18449712 in words is "eighteen million, four hundred forty-nine thousand, seven hundred twelve".