21106755214 has 8 divisors (see below), whose sum is σ = 31682017008. Its totient is φ = 10546082880.

The previous prime is 21106755181. The next prime is 21106755223. The reversal of 21106755214 is 41255760112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21106755214.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3643747 + ... + 3649534.

It is an arithmetic number, because the mean of its divisors is an integer number (3960252126).

Almost surely, 2^21106755214 is an apocalyptic number.

21106755214 is a deficient number, since it is larger than the sum of its proper divisors (10575261794).

21106755214 is a wasteful number, since it uses less digits than its factorization.

21106755214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294730.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 21106755214 in words is "twenty-one billion, one hundred six million, seven hundred fifty-five thousand, two hundred fourteen".