18211862217008 has 20 divisors (see below), whose sum is σ = 35782461682128. Its totient is φ = 8977678557120.

The previous prime is 18211862217001. The next prime is 18211862217011. The reversal of 18211862217008 is 80071226811281.

It is a happy number.

It is a super-2 number, since 2×18211862217008² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18211862217001) 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 3 ways as a sum of consecutive naturals, for example, 8015783291 + ... + 8015785562.

Almost surely, 2^{18211862217008} is an apocalyptic number.

It is an amenable number.

18211862217008 is a deficient number, since it is larger than the sum of its proper divisors (17570599465120).

18211862217008 is a wasteful number, since it uses less digits than its factorization.

18211862217008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16031568932 (or 16031568926 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 47.

The spelling of 18211862217008 in words is "eighteen trillion, two hundred eleven billion, eight hundred sixty-two million, two hundred seventeen thousand, eight".