18216346626 has 12 divisors (see below), whose sum is σ = 39468751062. Its totient is φ = 6072115536.

The previous prime is 18216346601. The next prime is 18216346627. The reversal of 18216346626 is 62664361281.

18216346626 is a `hidden beast` number, since 1 + 8 + 2 + 1 + 634 + 6 + 6 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17666397225 + 549949401 = 132915^2 + 23451^2 .

It is not an unprimeable number, because it can be changed into a prime (18216346627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506009611 + ... + 506009646.

Almost surely, 2^18216346626 is an apocalyptic number.

18216346626 is an abundant number, since it is smaller than the sum of its proper divisors (21252404436).

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

18216346626 is a wasteful number, since it uses less digits than its factorization.

18216346626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012019265 (or 1012019262 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 18216346626 in words is "eighteen billion, two hundred sixteen million, three hundred forty-six thousand, six hundred twenty-six".