21066105214 has 64 divisors (see below), whose sum is σ = 41143956480. Its totient is φ = 7844094720.

The previous prime is 21066105173. The next prime is 21066105233. The reversal of 21066105214 is 41250166012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6774292 + ... + 6777400.

It is an arithmetic number, because the mean of its divisors is an integer number (642874320).

Almost surely, 2^21066105214 is an apocalyptic number.

21066105214 is a deficient number, since it is larger than the sum of its proper divisors (20077851266).

21066105214 is a wasteful number, since it uses less digits than its factorization.

21066105214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 21066105214 in words is "twenty-one billion, sixty-six million, one hundred five thousand, two hundred fourteen".