21905767214 has 8 divisors (see below), whose sum is σ = 34791512688. Its totient is φ = 10308596320.

The previous prime is 21905767201. The next prime is 21905767283. The reversal of 21905767214 is 41276750912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322143602 + ... + 322143669.

It is an arithmetic number, because the mean of its divisors is an integer number (4348939086).

Almost surely, 2^21905767214 is an apocalyptic number.

21905767214 is a deficient number, since it is larger than the sum of its proper divisors (12885745474).

21905767214 is a wasteful number, since it uses less digits than its factorization.

21905767214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644287290.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 21905767214 in words is "twenty-one billion, nine hundred five million, seven hundred sixty-seven thousand, two hundred fourteen".