21266044124366 has 16 divisors (see below), whose sum is σ = 32303388047040. Its totient is φ = 10498252577280.

The previous prime is 21266044124333. The next prime is 21266044124417. The reversal of 21266044124366 is 66342144066212.

It is a self number, because there is not a number n which added to its sum of digits gives 21266044124366.

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, 8703710 + ... + 10875966.

It is an arithmetic number, because the mean of its divisors is an integer number (2018961752940).

Almost surely, 2^{21266044124366} is an apocalyptic number.

21266044124366 is a deficient number, since it is larger than the sum of its proper divisors (11037343922674).

21266044124366 is a wasteful number, since it uses less digits than its factorization.

21266044124366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234299.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 21266044124366 in words is "twenty-one trillion, two hundred sixty-six billion, forty-four million, one hundred twenty-four thousand, three hundred sixty-six".