18336744 has 96 divisors (see below), whose sum is σ = 53576640. Its totient is φ = 5644800.

The previous prime is 18336739. The next prime is 18336749. The reversal of 18336744 is 44763381.

It is an interprime number because it is at equal distance from previous prime (18336739) and next prime (18336749).

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

It is a junction number, because it is equal to n+sod(n) for n = 18336699 and 18336708.

It is not an unprimeable number, because it can be changed into a prime (18336749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86799 + ... + 87009.

It is an arithmetic number, because the mean of its divisors is an integer number (558090).

Almost surely, 2^18336744 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 18336744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26788320).

18336744 is an abundant number, since it is smaller than the sum of its proper divisors (35239896).

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

18336744 is a wasteful number, since it uses less digits than its factorization.

18336744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 304 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 18336744 is about 4282.1424544263. The cubic root of 18336744 is about 263.6983469149.

The spelling of 18336744 in words is "eighteen million, three hundred thirty-six thousand, seven hundred forty-four".