18669339 has 16 divisors (see below), whose sum is σ = 29786400. Its totient is φ = 11488608.

The previous prime is 18669331. The next prime is 18669367. The reversal of 18669339 is 93396681.

It is not a de Polignac number, because 18669339 - 2³ = 18669331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18669294 and 18669303.

It is not an unprimeable number, because it can be changed into a prime (18669331) 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, 26244 + ... + 26945.

It is an arithmetic number, because the mean of its divisors is an integer number (1861650).

Almost surely, 2^18669339 is an apocalyptic number.

18669339 is a deficient number, since it is larger than the sum of its proper divisors (11117061).

18669339 is a wasteful number, since it uses less digits than its factorization.

18669339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53211 (or 53205 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 18669339 is about 4320.8030503600. The cubic root of 18669339 is about 265.2831386929.

The spelling of 18669339 in words is "eighteen million, six hundred sixty-nine thousand, three hundred thirty-nine".