21068007715726 has 32 divisors (see below), whose sum is σ = 33933907704960. Its totient is φ = 9779448290976.

The previous prime is 21068007715723. The next prime is 21068007715739. The reversal of 21068007715726 is 62751770086012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21068007715723) 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 15 ways as a sum of consecutive naturals, for example, 4658956 + ... + 7990111.

It is an arithmetic number, because the mean of its divisors is an integer number (1060434615780).

Almost surely, 2^{21068007715726} is an apocalyptic number.

21068007715726 is a deficient number, since it is larger than the sum of its proper divisors (12865899989234).

21068007715726 is a wasteful number, since it uses less digits than its factorization.

21068007715726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12649968.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 21068007715726 in words is "twenty-one trillion, sixty-eight billion, seven million, seven hundred fifteen thousand, seven hundred twenty-six".