18424884249 has 24 divisors (see below), whose sum is σ = 26918840520. Its totient is φ = 12142996992.

The previous prime is 18424884227. The next prime is 18424884281. The reversal of 18424884249 is 94248842481.

18424884249 is a `hidden beast` number, since 1 + 84 + 2 + 488 + 42 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3189425625 + 15235458624 = 56475^2 + 123432^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18424884249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18424884195 and 18424884204.

It is not an unprimeable number, because it can be changed into a prime (18424884299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 372327 + ... + 418899.

It is an arithmetic number, because the mean of its divisors is an integer number (1121618355).

Almost surely, 2^18424884249 is an apocalyptic number.

It is an amenable number.

18424884249 is a deficient number, since it is larger than the sum of its proper divisors (8493956271).

18424884249 is a wasteful number, since it uses less digits than its factorization.

18424884249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47081 (or 47078 counting only the distinct ones).

The product of its digits is 4718592, while the sum is 54.

The spelling of 18424884249 in words is "eighteen billion, four hundred twenty-four million, eight hundred eighty-four thousand, two hundred forty-nine".