21394711110806 has 16 divisors (see below), whose sum is σ = 35276775576768. Its totient is φ = 9650633046600.

The previous prime is 21394711110781. The next prime is 21394711110821. The reversal of 21394711110806 is 60801111749312.

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 7 ways as a sum of consecutive naturals, for example, 3711779060 + ... + 3711784823.

It is an arithmetic number, because the mean of its divisors is an integer number (2204798473548).

Almost surely, 2^{21394711110806} is an apocalyptic number.

21394711110806 is a deficient number, since it is larger than the sum of its proper divisors (13882064465962).

21394711110806 is a wasteful number, since it uses less digits than its factorization.

21394711110806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7423564027.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 21394711110806 in words is "twenty-one trillion, three hundred ninety-four billion, seven hundred eleven million, one hundred ten thousand, eight hundred six".