18126749 has 8 divisors (see below), whose sum is σ = 18353280. Its totient is φ = 17901936.

The previous prime is 18126739. The next prime is 18126751. The reversal of 18126749 is 94762181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18126749 - 2⁴ = 18126733 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 (18126739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41072 + ... + 41510.

It is an arithmetic number, because the mean of its divisors is an integer number (2294160).

Almost surely, 2^18126749 is an apocalyptic number.

It is an amenable number.

18126749 is a deficient number, since it is larger than the sum of its proper divisors (226531).

18126749 is a wasteful number, since it uses less digits than its factorization.

18126749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859.

The product of its digits is 24192, while the sum is 38.

The square root of 18126749 is about 4257.5519961593. The cubic root of 18126749 is about 262.6878425715.

The spelling of 18126749 in words is "eighteen million, one hundred twenty-six thousand, seven hundred forty-nine".