21706726126 has 16 divisors (see below), whose sum is σ = 32707476000. Its totient is φ = 10804338688.

The previous prime is 21706726099. The next prime is 21706726159. The reversal of 21706726126 is 62162760712.

21706726126 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 397230 + ... + 448558.

It is an arithmetic number, because the mean of its divisors is an integer number (2044217250).

Almost surely, 2^21706726126 is an apocalyptic number.

21706726126 is a deficient number, since it is larger than the sum of its proper divisors (11000749874).

21706726126 is a wasteful number, since it uses less digits than its factorization.

21706726126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52283.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 21706726126 in words is "twenty-one billion, seven hundred six million, seven hundred twenty-six thousand, one hundred twenty-six".