21186344368112 has 80 divisors (see below), whose sum is σ = 51262558819584. Its totient is φ = 8240685120000.

The previous prime is 21186344368103. The next prime is 21186344368141.

It is a happy number.

21186344368112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21186344368112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13566314 + ... + 15047177.

Almost surely, 2^{21186344368112} is an apocalyptic number.

21186344368112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21186344368112 is an abundant number, since it is smaller than the sum of its proper divisors (30076214451472).

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

21186344368112 is a wasteful number, since it uses less digits than its factorization.

21186344368112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28614118 (or 28614112 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The spelling of 21186344368112 in words is "twenty-one trillion, one hundred eighty-six billion, three hundred forty-four million, three hundred sixty-eight thousand, one hundred twelve".