18016749 has 12 divisors (see below), whose sum is σ = 26988416. Its totient is φ = 12011004.

The previous prime is 18016729. The next prime is 18016759. The reversal of 18016749 is 94761081.

It is not a de Polignac number, because 18016749 - 2⁵ = 18016717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18016729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36829 + ... + 37314.

Almost surely, 2^18016749 is an apocalyptic number.

It is an amenable number.

18016749 is a deficient number, since it is larger than the sum of its proper divisors (8971667).

18016749 is an frugal number, since it uses more digits than its factorization.

18016749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74158 (or 74146 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18016749 is about 4244.6141167366. The cubic root of 18016749 is about 262.1554008837.

The spelling of 18016749 in words is "eighteen million, sixteen thousand, seven hundred forty-nine".