18443716 has 24 divisors (see below), whose sum is σ = 33044760. Its totient is φ = 9004800.

The previous prime is 18443713. The next prime is 18443717. The reversal of 18443716 is 61734481.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 18318400 = 354^2 + 4280^2 .

It is not an unprimeable number, because it can be changed into a prime (18443713) 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, 65496 + ... + 65776.

It is an arithmetic number, because the mean of its divisors is an integer number (1376865).

Almost surely, 2^18443716 is an apocalyptic number.

It is an amenable number.

18443716 is a deficient number, since it is larger than the sum of its proper divisors (14601044).

18443716 is a wasteful number, since it uses less digits than its factorization.

18443716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 613 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 18443716 is about 4294.6147673569. The cubic root of 18443716 is about 264.2101364885.

The spelling of 18443716 in words is "eighteen million, four hundred forty-three thousand, seven hundred sixteen".