18744066 has 48 divisors (see below), whose sum is σ = 44692128. Its totient is φ = 5630400.

The previous prime is 18744041. The next prime is 18744067. The reversal of 18744066 is 66044781.

It is a self number, because there is not a number n which added to its sum of digits gives 18744066.

It is not an unprimeable number, because it can be changed into a prime (18744067) 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, 26781 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (931086).

Almost surely, 2^18744066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18744066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22346064).

18744066 is an abundant number, since it is smaller than the sum of its proper divisors (25948062).

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

18744066 is a wasteful number, since it uses less digits than its factorization.

18744066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 18744066 is about 4329.4417654012. The cubic root of 18744066 is about 265.6366134899.

It can be divided in two parts, 187 and 44066, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 18744066 in words is "eighteen million, seven hundred forty-four thousand, sixty-six".