18741709 has 16 divisors (see below), whose sum is σ = 22032000. Its totient is φ = 15611904.

The previous prime is 18741703. The next prime is 18741713. The reversal of 18741709 is 90714781.

It is not a de Polignac number, because 18741709 - 2⁹ = 18741197 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 (18741703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41517 + ... + 41965.

It is an arithmetic number, because the mean of its divisors is an integer number (1377000).

Almost surely, 2^18741709 is an apocalyptic number.

It is an amenable number.

18741709 is a deficient number, since it is larger than the sum of its proper divisors (3290291).

18741709 is an equidigital number, since it uses as much as digits as its factorization.

18741709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 18741709 is about 4329.1695508492. The cubic root of 18741709 is about 265.6254787350.

The spelling of 18741709 in words is "eighteen million, seven hundred forty-one thousand, seven hundred nine".