18693744 has 80 divisors (see below), whose sum is σ = 52853760. Its totient is φ = 5667840.

The previous prime is 18693721. The next prime is 18693749. The reversal of 18693744 is 44739681.

18693744 = 107² + 108² + ... + 385².

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18693696 and 18693705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693749) 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 15 ways as a sum of consecutive naturals, for example, 24927 + ... + 25665.

It is an arithmetic number, because the mean of its divisors is an integer number (660672).

Almost surely, 2^18693744 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 18693744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26426880).

18693744 is an abundant number, since it is smaller than the sum of its proper divisors (34160016).

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

18693744 is a wasteful number, since it uses less digits than its factorization.

18693744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 18693744 is about 4323.6262558181. The cubic root of 18693744 is about 265.3986831507.

It can be divided in two parts, 186937 and 44, that multiplied together give a palindrome (8225228).

The spelling of 18693744 in words is "eighteen million, six hundred ninety-three thousand, seven hundred forty-four".