18682172424 has 96 divisors (see below), whose sum is σ = 52539789120. Its totient is φ = 6219291456.

The previous prime is 18682172417. The next prime is 18682172437. The reversal of 18682172424 is 42427128681.

18682172424 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 217 + 2 + 424 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18682172424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1594074 + ... + 1605750.

It is an arithmetic number, because the mean of its divisors is an integer number (547289470).

Almost surely, 2^18682172424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18682172424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26269894560).

18682172424 is an abundant number, since it is smaller than the sum of its proper divisors (33857616696).

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

18682172424 is a wasteful number, since it uses less digits than its factorization.

18682172424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12521 (or 12505 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The spelling of 18682172424 in words is "eighteen billion, six hundred eighty-two million, one hundred seventy-two thousand, four hundred twenty-four".