21115344354214 has 24 divisors (see below), whose sum is σ = 34829365675104. Its totient is φ = 9593686832400.

The previous prime is 21115344354173. The next prime is 21115344354217. The reversal of 21115344354214 is 41245344351112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115344354217) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 18522517 + ... + 19629424.

It is an arithmetic number, because the mean of its divisors is an integer number (1451223569796).

Almost surely, 2^{21115344354214} is an apocalyptic number.

21115344354214 is a deficient number, since it is larger than the sum of its proper divisors (13714021320890).

21115344354214 is a wasteful number, since it uses less digits than its factorization.

21115344354214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38154252 (or 38154241 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 21115344354214 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-four million, three hundred fifty-four thousand, two hundred fourteen".