21214064266405 has 64 divisors (see below), whose sum is σ = 27132322775040. Its totient is φ = 15898945708800.

The previous prime is 21214064266391. The next prime is 21214064266429. The reversal of 21214064266405 is 50466246041212.

It is not a de Polignac number, because 21214064266405 - 2¹¹ = 21214064264357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 553829484 + ... + 553867786.

It is an arithmetic number, because the mean of its divisors is an integer number (423942543360).

Almost surely, 2^{21214064266405} is an apocalyptic number.

It is an amenable number.

21214064266405 is a deficient number, since it is larger than the sum of its proper divisors (5918258508635).

21214064266405 is a wasteful number, since it uses less digits than its factorization.

21214064266405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39322.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 21214064266405 in words is "twenty-one trillion, two hundred fourteen billion, sixty-four million, two hundred sixty-six thousand, four hundred five".