18509449014 has 48 divisors (see below), whose sum is σ = 46305456288. Its totient is φ = 5233890816.

The previous prime is 18509449009. The next prime is 18509449037. The reversal of 18509449014 is 41094490581.

It is a happy number.

18509449014 is a `hidden beast` number, since 1 + 8 + 509 + 44 + 90 + 14 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 744997 + ... + 769440.

It is an arithmetic number, because the mean of its divisors is an integer number (964697006).

Almost surely, 2^18509449014 is an apocalyptic number.

18509449014 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18509449014 is an abundant number, since it is smaller than the sum of its proper divisors (27796007274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18509449014 is a wasteful number, since it uses less digits than its factorization.

18509449014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514549 (or 1514546 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 18509449014 in words is "eighteen billion, five hundred nine million, four hundred forty-nine thousand, fourteen".