18834909 has 16 divisors (see below), whose sum is σ = 26873280. Its totient is φ = 11698560.

The previous prime is 18834901. The next prime is 18834911. The reversal of 18834909 is 90943881.

It is not a de Polignac number, because 18834909 - 2³ = 18834901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18834901) 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, 769 + ... + 6185.

It is an arithmetic number, because the mean of its divisors is an integer number (1679580).

Almost surely, 2^18834909 is an apocalyptic number.

18834909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18834909 is a deficient number, since it is larger than the sum of its proper divisors (8038371).

18834909 is a wasteful number, since it uses less digits than its factorization.

18834909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500.

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

The square root of 18834909 is about 4339.9203909749. The cubic root of 18834909 is about 266.0650574849.

The spelling of 18834909 in words is "eighteen million, eight hundred thirty-four thousand, nine hundred nine".