18682156224 has 140 divisors (see below), whose sum is σ = 55621040904. Its totient is φ = 6200257536.

The previous prime is 18682156223. The next prime is 18682156267. The reversal of 18682156224 is 42265128681.

18682156224 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 2 + 15 + 622 + 4 = 666.

It is a super-2 number, since 2×18682156224² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18682156224.

It is not an unprimeable number, because it can be changed into a prime (18682156223) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1200139 + ... + 1215605.

Almost surely, 2^18682156224 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 18682156224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27810520452).

18682156224 is an abundant number, since it is smaller than the sum of its proper divisors (36938884680).

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

18682156224 is a wasteful number, since it uses less digits than its factorization.

18682156224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15724 (or 15705 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The spelling of 18682156224 in words is "eighteen billion, six hundred eighty-two million, one hundred fifty-six thousand, two hundred twenty-four".