18741009 has 16 divisors (see below), whose sum is σ = 28786688. Its totient is φ = 10623312.

The previous prime is 18741007. The next prime is 18741013. The reversal of 18741009 is 90014781.

It is not a de Polignac number, because 18741009 - 2¹ = 18741007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18741001) 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, 847 + ... + 6180.

It is an arithmetic number, because the mean of its divisors is an integer number (1799168).

Almost surely, 2^18741009 is an apocalyptic number.

It is an amenable number.

18741009 is a deficient number, since it is larger than the sum of its proper divisors (10045679).

18741009 is a wasteful number, since it uses less digits than its factorization.

18741009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 18741009 is about 4329.0887031799. The cubic root of 18741009 is about 265.6221716700.

The spelling of 18741009 in words is "eighteen million, seven hundred forty-one thousand, nine".