18726144 has 72 divisors (see below), whose sum is σ = 51263520. Its totient is φ = 6064128.

The previous prime is 18726143. The next prime is 18726151. The reversal of 18726144 is 44162781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18726143) 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 7 ways as a sum of consecutive naturals, for example, 28087 + ... + 28745.

Almost surely, 2^18726144 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 18726144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25631760).

18726144 is an abundant number, since it is smaller than the sum of its proper divisors (32537376).

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

18726144 is an equidigital number, since it uses as much as digits as its factorization.

18726144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 701 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18726144 is about 4327.3714885598. The cubic root of 18726144 is about 265.5519243318.

The spelling of 18726144 in words is "eighteen million, seven hundred twenty-six thousand, one hundred forty-four".