18744486 has 16 divisors (see below), whose sum is σ = 37555968. Its totient is φ = 6237000.

The previous prime is 18744463. The next prime is 18744487. The reversal of 18744486 is 68444781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18744487) 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, 1311 + ... + 6261.

It is an arithmetic number, because the mean of its divisors is an integer number (2347248).

Almost surely, 2^18744486 is an apocalyptic number.

18744486 is an abundant number, since it is smaller than the sum of its proper divisors (18811482).

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

18744486 is a wasteful number, since it uses less digits than its factorization.

18744486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587.

The product of its digits is 172032, while the sum is 42.

The square root of 18744486 is about 4329.4902702281. The cubic root of 18744486 is about 265.6385975231.

The spelling of 18744486 in words is "eighteen million, seven hundred forty-four thousand, four hundred eighty-six".