18212246187 has 16 divisors (see below), whose sum is σ = 26155493760. Its totient is φ = 11234970432.

The previous prime is 18212246179. The next prime is 18212246189. The reversal of 18212246187 is 78164221281.

It is not a de Polignac number, because 18212246187 - 2³ = 18212246179 is a prime.

It is a super-2 number, since 2×18212246187² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18212246189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3712818 + ... + 3717719.

It is an arithmetic number, because the mean of its divisors is an integer number (1634718360).

Almost surely, 2^18212246187 is an apocalyptic number.

18212246187 is a deficient number, since it is larger than the sum of its proper divisors (7943247573).

18212246187 is a wasteful number, since it uses less digits than its factorization.

18212246187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430602.

The product of its digits is 86016, while the sum is 42.

The spelling of 18212246187 in words is "eighteen billion, two hundred twelve million, two hundred forty-six thousand, one hundred eighty-seven".