18975744 has 132 divisors (see below), whose sum is σ = 57479760. Its totient is φ = 6021120.

The previous prime is 18975731. The next prime is 18975767. The reversal of 18975744 is 44757981.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (282240) is a multiple of the sum of its prime divisors (105).

It is a self number, because there is not a number n which added to its sum of digits gives 18975744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267229 + ... + 267299.

Almost surely, 2^18975744 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 18975744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28739880).

18975744 is an abundant number, since it is smaller than the sum of its proper divisors (38504016).

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

18975744 is a wasteful number, since it uses less digits than its factorization.

18975744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 105 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 18975744 is about 4356.1157009428. The cubic root of 18975744 is about 266.7265643228.

The spelling of 18975744 in words is "eighteen million, nine hundred seventy-five thousand, seven hundred forty-four".