18484999 has 16 divisors (see below), whose sum is σ = 20448288. Its totient is φ = 16607232.

The previous prime is 18484997. The next prime is 18485009. The reversal of 18484999 is 99948481.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18484999 - 2¹ = 18484997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18484993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134859 + ... + 134995.

It is an arithmetic number, because the mean of its divisors is an integer number (1278018).

Almost surely, 2^18484999 is an apocalyptic number.

18484999 is a deficient number, since it is larger than the sum of its proper divisors (1963289).

18484999 is a wasteful number, since it uses less digits than its factorization.

18484999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its digits is 746496, while the sum is 52.

The square root of 18484999 is about 4299.4184490463. The cubic root of 18484999 is about 264.4071188298.

The spelling of 18484999 in words is "eighteen million, four hundred eighty-four thousand, nine hundred ninety-nine".