18809349 has 16 divisors (see below), whose sum is σ = 27316800. Its totient is φ = 11442816.

The previous prime is 18809321. The next prime is 18809369. The reversal of 18809349 is 94390881.

18809349 = 415² + 416² + ... + 503².

It is not a de Polignac number, because 18809349 - 2⁸ = 18809093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18809349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18809309) 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, 762 + ... + 6180.

It is an arithmetic number, because the mean of its divisors is an integer number (1707300).

Almost surely, 2^18809349 is an apocalyptic number.

It is an amenable number.

18809349 is a deficient number, since it is larger than the sum of its proper divisors (8507451).

18809349 is a wasteful number, since it uses less digits than its factorization.

18809349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 18809349 is about 4336.9746367716. The cubic root of 18809349 is about 265.9446480639.

The spelling of 18809349 in words is "eighteen million, eight hundred nine thousand, three hundred forty-nine".