18965144 has 32 divisors (see below), whose sum is σ = 39439440. Its totient is φ = 8476800.

The previous prime is 18965143. The next prime is 18965153. The reversal of 18965144 is 44156981.

It is a junction number, because it is equal to n+sod(n) for n = 18965098 and 18965107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18965143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3602 + ... + 7134.

Almost surely, 2^18965144 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 18965144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19719720).

18965144 is an abundant number, since it is smaller than the sum of its proper divisors (20474296).

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

18965144 is a wasteful number, since it uses less digits than its factorization.

18965144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611 (or 3607 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 18965144 is about 4354.8988507197. The cubic root of 18965144 is about 266.6768898858.

The spelling of 18965144 in words is "eighteen million, nine hundred sixty-five thousand, one hundred forty-four".