21214210064406 has 32 divisors (see below), whose sum is σ = 44711481938688. Its totient is φ = 6696981218400.

The previous prime is 21214210064381. The next prime is 21214210064417. The reversal of 21214210064406 is 60446001241212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761006656 + ... + 761034531.

It is an arithmetic number, because the mean of its divisors is an integer number (1397233810584).

Almost surely, 2^{21214210064406} is an apocalyptic number.

21214210064406 is an abundant number, since it is smaller than the sum of its proper divisors (23497271874282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214210064406 is a wasteful number, since it uses less digits than its factorization.

21214210064406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522041316.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 21214210064406 in words is "twenty-one trillion, two hundred fourteen billion, two hundred ten million, sixty-four thousand, four hundred six".