18534909 has 8 divisors (see below), whose sum is σ = 25132320. Its totient is φ = 12147056.

The previous prime is 18534889. The next prime is 18534959. The reversal of 18534909 is 90943581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18534909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18534959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52182 + ... + 52535.

It is an arithmetic number, because the mean of its divisors is an integer number (3141540).

Almost surely, 2^18534909 is an apocalyptic number.

It is an amenable number.

18534909 is a deficient number, since it is larger than the sum of its proper divisors (6597411).

18534909 is a wasteful number, since it uses less digits than its factorization.

18534909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104779.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18534909 is about 4305.2188097703. The cubic root of 18534909 is about 264.6448737803.

The spelling of 18534909 in words is "eighteen million, five hundred thirty-four thousand, nine hundred nine".